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Tools and Uses => Reloading => Topic started by: stangzilla on January 04, 2021, 12:44:00 PM

Title: can use magnum primers in non-magnum loads? (9mm)
Post by: stangzilla on January 04, 2021, 12:44:00 PM
is it safe to use magnum primers in a non-magnum load such as 9mm?
I have regular small pistol primers, but I have more magnum primers.  just wondering if its safe to use them in 9mm or non magnum loads
from research a lot of people say its ok just lower the powder by 10%-16% or start low and work up your load

https://www.thehighroad.org/index.php?threads/small-pistol-magnum-primers-in-a-9mm.635510/

https://www.northwestfirearms.com/threads/using-cci-small-pistol-magnum-primers-for-a-9mm.80796/

https://thefiringline.com/forums/showthread.php?t=358545

how about small rifle primers in a 9mm?
https://www.snipershide.com/shooting/threads/use-sr-primers-in-9mm-loads.7025299/

i'll reload by the book using proper primers.  just wondering if and when no can find primers, is it safe to use the magnum primer in normal loads?  or small rifle in a pistol load?
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: jc2721 on January 04, 2021, 12:54:03 PM
I've read that you should probably reduce your load by 10% (then work your way back up) as a margin of safety when switching primers, fwiw.

Small rifle primers have thicker cups and are slightly "taller" overall.  They're even harder to find than SPP, so I wouldn't waste mine on 9mm loads--i'd look to trade SRPs for SPPs if I could. 

I bought a couple of bricks of magnum SPPs just in case, and they'll stay in storage unless things get really desperate.




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Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: jc2721 on January 04, 2021, 12:59:53 PM
I'd also check other forums like castboolits or the Smith & Wesson forum where this topic is pretty thoroughly discussed.  I think those forums tend to have fewer keyboard wannabes and a lot more practical experience.  Again, my opinion.

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Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: stangzilla on January 04, 2021, 01:05:05 PM
I'd also check other forums like castboolits or the Smith & Wesson forum where this topic is pretty thoroughly discussed.  I think those forums tend to have fewer keyboard wannabes and a lot more practical experience.  Again, my opinion.

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thanks.  :shaka:
 i'll do a lot more research before trying this.  and use up my regular primers first.  I hope it doesn't come to this, but just in case I want to be prepared in my mind what to do
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: changemyoil66 on January 04, 2021, 01:18:49 PM
.
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: justin1098 on January 04, 2021, 05:39:14 PM
I have used both magnum and non-magnum primers in 223 and 6br loads. the thicker cup in magnum primers can be helpful for certain loads.  Doesn't have much of an affect on velocity.
I don't have experience with pistol loads.
German Salazar did some research on the difference of primers. Pictures are linked here. https://www.6mmbr.com/primerpix.html
It seams like there is more variation between brands than magnum/non-magnum.
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: macsak on January 04, 2021, 07:02:36 PM
I've been watching reloading vids on YT.  I don't reload.  Theres a bunch on guys using those toy snaps for toy guns you can buy at the supermarket.  Those red ones that are connected in a circle.  IDK how safe this is.

please do not post speculation and ideas you have not tried yourself on a relaoding thread...
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: jase90 on January 05, 2021, 08:38:01 AM
I have successfully used magnum small pistol primers on 9mm. Everything being else being the same (powder, projectile, oal), I did not get a significant increase in velocity. From what I wrote down in my load book I gained a higher mean velocity of like 8fps I believe. But you can get that difference on any given day using regular small pistol primers, or even a different brand than what you normally use.

If you wanna try, do your own work up. Don't take my word for it.
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: Inspector on January 05, 2021, 01:38:26 PM
I can’t find it now but someone I follow wrote to CCI, Remington, Winchester and Federal. Remington did not respond. CCI and Federal stated that their small magnum pistol primers and SPP are exactly the same as far as internals are concerned and only vary in the construction of the cup. So no need to change your load. Only Winchester suggested starting your current load reduced 10%. With that said, the OP did his own testing with all 4 brands of SPP and SMPP. And he saw no difference in velocities in any of his loads. Take this with a grain of salt. You should do your own testing but I suspect it is true that there are no differences between the 2 types of primers as far as internals are concerned. JMHO
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: stangzilla on January 05, 2021, 03:17:34 PM
I can’t find it now but someone I follow wrote to CCI, Remington, Winchester and Federal. Remington did not respond. CCI and Federal stated that their small magnum pistol primers and SPP are exactly the same as far as internals are concerned and only vary in the construction of the cup. So no need to change your load. Only Winchester suggested starting your current load reduced 10%. With that said, the OP did his own testing with all 4 brands of SPP and SMPP. And he saw no difference in velocities in any of his loads. Take this with a grain of salt. You should do your own testing but I suspect it is true that there are no differences between the 2 types of primers as far as internals are concerned. JMHO

I saw that in a few other forums too.  that the magnum cup is thicker is all.  but if and when the time comes I will start low and work up my own loads just to be on the safe side
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: blastoff747 on January 06, 2021, 12:32:22 AM
Perfect timing

https://www.youtube.com/watch?v=jWqDVmJMZfo&list=FL3Azmn5GJeudiok6d6lEePA&index=127 (https://www.youtube.com/watch?v=jWqDVmJMZfo&list=FL3Azmn5GJeudiok6d6lEePA&index=127)
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: Inspector on January 06, 2021, 01:51:27 AM
Perfect timing

https://www.youtube.com/watch?v=jWqDVmJMZfo&list=FL3Azmn5GJeudiok6d6lEePA&index=127 (https://www.youtube.com/watch?v=jWqDVmJMZfo&list=FL3Azmn5GJeudiok6d6lEePA&index=127)
Good info, thanks!
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: stangzilla on January 06, 2021, 05:16:43 AM
Perfect timing

https://www.youtube.com/watch?v=jWqDVmJMZfo&list=FL3Azmn5GJeudiok6d6lEePA&index=127 (https://www.youtube.com/watch?v=jWqDVmJMZfo&list=FL3Azmn5GJeudiok6d6lEePA&index=127)

 :shaka:
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: Inspector on January 06, 2021, 05:27:36 AM
I saw that in a few other forums too.  that the magnum cup is thicker is all.  but if and when the time comes I will start low and work up my own loads just to be on the safe side
I didn’t want to say this but I have already started my own testing between CCI SPP and SMPP. I started using a full case of trail Boss in 357 magnum cases. I figured if I saw a difference I was well within SAAMI specs. LOL I saw absolutely no difference in velocities. So I moved to 38 +P loads using Titegroup and Unique. And still no difference in velocities. Then I went to full power loads 10% off of max using H110 and saw no differences. I only have an additional 1k of magnum primers but at least I know I’m safe no matter what load or cartridge I use them in.
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: RifleArts on March 07, 2021, 01:22:06 AM

Much mahalo for sharing!!!



Perfect timing

https://www.youtube.com/watch?v=jWqDVmJMZfo&list=FL3Azmn5GJeudiok6d6lEePA&index=127 (https://www.youtube.com/watch?v=jWqDVmJMZfo&list=FL3Azmn5GJeudiok6d6lEePA&index=127)
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: drck1000 on March 07, 2021, 01:34:16 AM
https://youtu.be/NGVRGsoOr6k

I have both SPP and mag SPP. Will eventually get around to loading both for 9 mm.
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: Inspector on March 09, 2021, 12:32:45 PM
Not sure that I have much to offer but since I was ordered to post in this thread so here goes.

While reloading 9mm I have substituted Small Rifle and Small Magnum Pistol primers with my basic loading. I saw no difference in POA or POI between any of the rounds. I tested with my target rounds using 124gr Montana Gold JHP and Titegroup. The thing is though that I rarely ever load up to the maximum from any of my books. So the addition of a SRP or a SMPP probably would not change much. I did check for signs of pressure and saw no difference between different primers. I did not chronograph any of these loads.

I have started to test substituting SPP for SMPP in my 357 Magnum Rounds. I did this for my target rounds (125gr Montana Gold JHP over 5.0gr of titegroup in 357 Manum cases) and saw no difference in POA or POI. Also, I substituted the same primers in my moderate 357 magnum loads which is 158gr PC boolit over a good charge of Unique. Again I saw no differences whatsoever. In my full power magnum loads over H110/W296 I only use SMPP.

I have not shot in well over a month now so I have my next test rounds loaded but I have not shot any of them. These test rounds are 115gr DG PC boolits over Green Dot using SPP, SRP and SMPP.
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: drck1000 on March 09, 2021, 12:40:58 PM
Not sure that I have much to offer but since I was ordered to post in this thread so here goes.

While reloading 9mm I have substituted Small Rifle and Small Magnum Pistol primers with my basic loading. I saw no difference in POA or POI between any of the rounds. I tested with my target rounds using 124gr Montana Gold JHP and Titegroup. The thing is though that I rarely ever load up to the maximum from any of my books. So the addition of a SRP or a SMPP probably would not change much. I did check for signs of pressure and saw no difference between different primers. I did not chronograph any of these loads.

I have started to test substituting SPP for SMPP in my 357 Magnum Rounds. I did this for my target rounds (125gr Montana Gold JHP over 5.0gr of titegroup in 357 Manum cases) and saw no difference in POA or POI. Also, I substituted the same primers in my moderate 357 magnum loads which is 158gr PC boolit over a good charge of Unique. Again I saw no differences whatsoever. In my full power magnum loads over H110/W296 I only use SMPP.

I have not shot in well over a month now so I have my next test rounds loaded but I have not shot any of them. These test rounds are 115gr DG PC boolits over Green Dot using SPP, SRP and SMPP.
You used SRP? Those suckahs worth weight in gold these days.
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: Inspector on March 09, 2021, 01:09:38 PM
You used SRP? Those suckahs worth weight in gold these days.
I still have a small amount of SPP left. I started testing SRP because I have a good amount of them and I am not shooting a lot of rifle at the moment. And most of the rifles I have take LRP anyway. So it just seems that SRP are the right move for me when I run out of SPP. I have some match and BR SRP as well so I need to test those next.
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: drck1000 on March 09, 2021, 01:29:37 PM
I still have a small amount of SPP left. I started testing SRP because I have a good amount of them and I am not shooting a lot of rifle at the moment. And most of the rifles I have take LRP anyway. So it just seems that SRP are the right move for me when I run out of SPP. I have some match and BR SRP as well so I need to test those next.
Makes sense.  Can't even sniff SRP nowadays. . .

I've been consumed by loading for 308 lately, so in general LRP.  I did pick up some LRP mag lately when I saw it in stock.  Mostly just to have, but maybe try in the future.  After I looked into it, I found that many rifle reloaders prefer the mag primers for loads.  At one point, SRP brass was the only type that was available and I would have considered that if SRP was available.  I know many folks who are serious about reloading for accuracy prefer SRP, particularly the 308 Win Palma brass.  I don't envision venturing beyond the standard 308 brass though. 
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: stangzilla on March 09, 2021, 01:50:53 PM
i'm going to try some 9mm with SMPP next time just to see if its reliable in my obsolete G19
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: drck1000 on March 09, 2021, 02:24:38 PM
i'm going to try some 9mm with SMPP next time just to see if its reliable in my obsolete G19
Let me know when you do the testing.   ;D
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: stangzilla on March 09, 2021, 02:28:25 PM
Let me know when you do the testing.   ;D

will do.  probably not for a couple weeks.  no time to reload before that.   :shaka:
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: RifleArts on March 09, 2021, 04:47:26 PM
Standing by for after action rep

 :shaka:

i'm going to try some 9mm with SMPP next time just to see if its reliable in my obsolete G19
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: drck1000 on March 10, 2021, 10:44:44 AM
will do.  probably not for a couple weeks.  no time to reload before that.   :shaka:
No rush.  A video will be great (as always). 

Don't expect any problems.  Just good get feedback on experiences.  I'll get around to that eventually, but I've been focused on loading for 308. 
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: aletheuo137 on March 10, 2021, 01:10:40 PM
i'm going to try some 9mm with SMPP next time just to see if its reliable in my obsolete G19
Did the cancel culture get to your Glock 19?

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Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: stangzilla on March 10, 2021, 01:27:47 PM
Did the cancel culture get to your Glock 19?

Sent from my SM-A102U using Tapatalk

could be.  but i dont know why.  my G19 is down with racial equality.   ;)
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: aletheuo137 on March 10, 2021, 01:29:45 PM
Black guns matter!
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: stangzilla on March 10, 2021, 01:38:54 PM
Black guns matter!

 :thumbsup:
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: drck1000 on April 06, 2021, 09:29:49 AM
Stang - Update on testing for magnum primers?  I was thankfully able to get more SPP, but I'm still planning on loading up 9 mm with the SPP magnum primers.  But will start with SPP first. 
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: stangzilla on April 06, 2021, 09:42:11 AM
Stang - Update on testing for magnum primers?  I was thankfully able to get more SPP, but I'm still planning on loading up 9 mm with the SPP magnum primers.  But will start with SPP first.

sorry, didn't get around to doing that yet.  been loading some 357 and 44mag lately
maybe in a week or 2 i'll get back to the 9mm
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: drck1000 on April 06, 2021, 09:56:26 AM
sorry, didn't get around to doing that yet.  been loading some 357 and 44mag lately
maybe in a week or 2 i'll get back to the 9mm
All good.  Was just wondering.  I know you think .357 and .44 Mag are more seksi. . .  ;D

I'm still occupied with reloading for .308 for the near future, but will hopefully start 9 mm soon.
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: stangzilla on April 06, 2021, 05:14:45 PM
Stang - Update on testing for magnum primers?  I was thankfully able to get more SPP, but I'm still planning on loading up 9 mm with the SPP magnum primers.  But will start with SPP first.

i have not loaded the 9mm using magnum primers, but i have reloaded low level 44mag and 357 mag using magnum primers without a problem.  such as trail boss or other lower pressure loads.  but i dont see this as the same as 9mm with magnum primers
bc i am shooting the low pressure magnum loads out of a magnum revolver, and i assume the hammer strikes are heavier in the magnum revolvers vs in my Glock19.  i dont know this for a fact, but just seeing as the DA trigger is much heavier in the magnum revolvers than the Glock19,
i think the only worry i have with the G19 is getting light primer strikes using magnum primers
next week i have an extra day off so maybe i can do some reloading then.   :shaka:
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: drck1000 on April 06, 2021, 05:30:34 PM
i have not loaded the 9mm using magnum primers, but i have reloaded low level 44mag and 357 mag using magnum primers without a problem.  such as trail boss or other lower pressure loads.  but i dont see this as the same as 9mm with magnum primers
bc i am shooting the low pressure magnum loads out of a magnum revolver, and i assume the hammer strikes are heavier in the magnum revolvers vs in my Glock19.  i dont know this for a fact, but just seeing as the DA trigger is much heavier in the magnum revolvers than the Glock19,
i think the only worry i have with the G19 is getting light primer strikes using magnum primers
next week i have an extra day off so maybe i can do some reloading then.   :shaka:
The function is something I was wondering about too.  I read where factory springs have typically been ok.  I shoot mostly factory springs, so was thinking I'd be ok.  Now that I have more SPP, I may save the magnums for the cartridges they were meant for. 
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: stangzilla on April 17, 2021, 11:57:37 AM
i'm going to try some 9mm with SMPP next time just to see if its reliable in my obsolete G19

Finally got around to loading 40 rounds of 9mm with SPP magnum
All 40 rounds fired without a hiccup. No problem
Primer cci 550 spp magnum
Powder titegroup 4.8 grains
Bullet everglades ammo 115 grain plated #2 (heavy plated, .356 diameter)
OAL 1.125"
My conclusion is magnum primers work with the stock springs in a Glock19  :thumbsup:
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: drck1000 on April 17, 2021, 12:02:49 PM
Finally got around to loading 40 rounds of 9mm with SPP magnum
All 40 rounds fired without a hiccup. No problem
Primer cci 550 spp magnum
Powder titegroup 4.8 grains
Bullet everglades ammo 115 grain plated #2 (heavy plated, .356 diameter)
OAL 1.125"
My conclusion is magnum primers work with the stock springs in a Glock19  :thumbsup:
Awesome. I think I have the same Everglades boolits. Were you able to compare with factory 115 gr?

I have some CCi regular SPP, so will start with that. But I am looking forward to testing the magnum SPP too.
Title: Re: can use magnum primers in non-magnum loads? (9mm)
Post by: RifleArts on April 17, 2021, 12:21:39 PM
Awesome and Much Mahalo Stangzilla for the data.



Finally got around to loading 40 rounds of 9mm with SPP magnum
All 40 rounds fired without a hiccup. No problem
Primer cci 550 spp magnum
Powder titegroup 4.8 grains
Bullet everglades ammo 115 grain plated #2 (heavy plated, .356 diameter)
OAL 1.125"
My conclusion is magnum primers work with the stock springs in a Glock19  :thumbsup: