i made some 7.65x53mm Argentine Brass using .270 Winchester cases and am faced with having to turn down the necks in order to chamber the round. I'm contemplating on scrapping the whole project and springing for properly sized PPU or Norma brass instead to save on cost. Does anybody neck turn and if so, what system do you use and/or recommend?

Sorry, but I like projects like this. Not only keeps me busy but I find it interesting.

Probably not what you want to pay, but this is what I use:

http://rcbs.com/Products/Case-Preparation/Case-Trimming/Trim-Pro-Trim-Pro-2-Power-Unit-120-VAC.aspx

I will make you the offer to come by my house and you can use my tools to trim and chamfer your cases. However, I only have Saturday after lunch open these days and I live in Makakilo. LMK if you want to take me up on the offer.

I did some a few years ago. I used the K&M tool. It is a pain. I would recommend the drill adapter shell holder. I sold the tool already.
Usually guys doing case forming ream the inside instead. It's easier and quicker. You just stick the reamer in the top of the case forming die and give it a few turns.

I've done it for consistency in target ammunition. However, way out of spec neck concentricity means also case body being out of spec as well.  I found that case stretch, upon firing, is effected by such irregular concentricity.  That causes to case to be a slight banana shape after firing.  This made me change my theory of neck trimming.  I now measure the necks and sort out any brass that is significantly out.  Not worth the time and effort in my situation..

For making brass for uncommon calibers it might be worth it if that brass is significantly hard to acquire. 

I'd say, if you CAN find the brass in sufficient quantities, skip neck turning.

Wondering if you are using a Lee sizer die?

One tip if you do decide to trim.  Be careful how far down you cut onto the shoulder.

A friend of mine trimmed too far down and ended up with the neck of the case breaking off, on firing, and the neck stuck in the chamber.

That could have been a very bad day if the next round somehow got shoved in there and fired.

Luckily, the next wouldn't chamber. 

Also to note, this was a match AR.  Luckily he was single loading at the time.  If the mag was loaded, the next round could have slamfired out of battery.

Sorry, but I like projects like this. Not only keeps me busy but I find it interesting.

Probably not what you want to pay, but this is what I use:

http://rcbs.com/Products/Case-Preparation/Case-Trimming/Trim-Pro-Trim-Pro-2-Power-Unit-120-VAC.aspx

I will make you the offer to come by my house and you can use my tools to trim and chamfer your cases. However, I only have Saturday after lunch open these days and I live in Makakilo. LMK if you want to take me up on the offer.

I too enjoy projects like this but as much as I enjoy learning how to learn new techniques and use new equipment, I consider the cost of going down that path (or at least try to). I've spent the last 24 hours reading up on neck turning in an effort to understand not only how its done but why its done and would love to buy the equipment just to try but I'm looking at spending a minimum of $150 just to turn 100 or less cases. I appreciate the offer and may take you up on it after I feel that I am familiar enough with the process.

~F

Wondering if you are using a Lee sizer die?

Yes, I'm using the Lee sizing die.

I too enjoy projects like this but as much as I enjoy learning how to learn new techniques and use new equipment, I consider the cost of going down that path (or at least try to). I've spent the last 24 hours reading up on neck turning in an effort to understand not only how its done but why its done and would love to buy the equipment just to try but I'm looking at spending a minimum of $150 just to turn 100 or less cases. I appreciate the offer and may take you up on it after I feel that I am familiar enough with the process.

~F

Once we get the machine set up it is a quick and easy task to do 100. You can probably do all 100 in an hour or less. LMK

Maybe try another brand FL sizer die?  Read on another forum that the Lee sizer
doesn't work well on forming 7.65 argentine is why.

I agree with Heavies in that if a case neck is out of spec, it probably means the other parts are out of spec also, so not much use in turning the neck or trying to turn a normal case into a match case. Save yourself the trouble and buy Lapua brass for about $1 each.

Anyways, found this on YouTube.

Maybe try another brand FL sizer die?  Read on another forum that the Lee sizer
doesn't work well on forming 7.65 argentine is why.

My understanding is the the Lee die, advertised as "7.65x53mm Belgian/Argentine", does not properly size the brass for the Argentine because the Argentine has a slightly shorter case when measured from the shoulder. Because the die is geared toward sizing the longer Belgian, as opposed to Argentine, brass, the die doesn't push the shoulder back sufficiently. As a result, Argentine brass sized with the Lee die will not chamber properly and allow you to close the bolt. The solution to the problem is to seat the case deeper into the die by raising the case in the shell holder, filing down the surface of the shell holder or a combination of the two.  The third and fourth alternative are the most expensive work-arounds: buy a proper sizing die and buy specialty shell holders like the Redding Competition Shellholders.  I used a .013 feeler gauge to raise the shell higher because I had a set lying around and this did the trick and allowed me to chamber the round (w/o the bullet) and close the bolt.

...not to be confused with rubber necking....something the people of Hawaii seem to be very proficient at during rush hour traffic.

Ya, I'm like you;  will try the simplest/cheapest work around first.  Then see what happens.
Was case run out okay?   I like shell holders and cases to be loose on the press ram; case
can self center going into the die.   Didn't have good results forming 7mm08  from 308
7.7 J f from 30 06 on Lee dies.   Run out was bad on both.  Had no choice but to use the
7.7 J.  Didn't use the 7mm08 as new cases are cheap/available.  Also brass flowed into the
vent hole in the dies so the end result was very ugly (to me).   Forming 300 black on Lee
was no problem though.   Not that it matters in a milsurp, end of the day.