Chrono test using 4.0 gr of Bullseye in each load. Colt gvt 5.5 in barsto match bbl with fed brass and wwLpp. Velocity/SD
.....
The first bullet is my 200 gr.hand cast bullet using a mold made by Miha Previc in Slovenia. It is sized to 0.452 dia and lubricated with my own blend of Hawaiian beeswax and Alox2138F.
=746/6
The second bullet is a 185 gr soft swaged target hollow point .
=700/10
The third is a 230 gr polymer coated bullet from Blue
=709/9

Why is the lightest bullet the slowest bullet?
It doesn't make sense.
=========

Chrono test using 4.0 gr of Bullseye in each load. Colt gvt 5.5 in barsto match bbl with fed brass and wwLpp. Velocity/SD
.....
The first bullet is my 200 gr.hand cast bullet using a mold made by Miha Previc in Slovenia. It is sized to 0.452 dia and lubricated with my own blend of Hawaiian beeswax and Alox2138F.
=746/6
The second bullet is a 185 gr soft swaged target hollow point .
=700/10
The third is a 230 gr polymer coated bullet from Blue
=709/9

Why is the lightest bullet the slowest bullet?
It doesn't make sense.
=========

pressure?

Takes less pressure to push out the lighter bullet therefore less pressure builds up inside case before bullet exits cartridge/barrel.
Probably also had more "flame" coming out of barrel as powder was still burning after cartridge leaves case/barrel.

BE is a really fast powder.  It would probably all be ignited, even in a 5.5bbl

Perhaps you’re getting a better seal with your hand cast and sized 200 grn SWC plus better lube.  Better seal = more velocity would be my guess

Takes less pressure to push out the lighter bullet therefore less pressure builds up inside case before bullet exits cartridge/barrel.
Probably also had more "flame" coming out of barrel as powder was still burning after cartridge leaves case/barrel.

Does make sense.  Usually your step the powder up a little when using lighter bullet for more velocity.  One could stay within safer pressure with a lighter projectile and achieve higher velocity

Does make sense.  Usually your step the powder up a little when using lighter bullet for more velocity.  One could stay within safer pressure with a lighter projectile and achieve higher velocity

Yep, my limited handgun reloading experience with published load data is less grains bullet, more grains powder.

BE is a really fast powder.  It would probably all be ignited, even in a 5.5bbl

Perhaps you’re getting a better seal with your hand cast and sized 200 grn SWC plus better lube.  Better seal = more velocity would be my guess

....
Yep. I think the low speed with the lighter bullet has something  to do with bbl friction. These 185 LSWCHP bullets have that crappy white graphite lube. I never ever had good results with similar bullets. I shot all 3 test loads for accuracy impressions yesterday and the handcast bullets were easily the best performing batch. Pic is 25 yd from the bench.

The Blue 230RN shot about a 4 inch group. That's pretty typical for ball ammo. The cool thing is that the ipsc pf came out to 163 which is real close to 165 major if you are interested in action pistol competition.