Unique powder 9mm Load Data

[LiveLife]

I found a 1.5 MOA load for my PCC! I beat the most accurate factory ammo for that gun ... THEN at 50 yards ... WTH

Sorry to burst your bubble but 1.5 MOA load at 25 yards will need to be smaller than .375" and .75" at 50 yards. I now celebrate if I can get 1" groups at 50 yards (2 MOA) with my carbine loads.

But getting greater accuracy than decent factory ammo with your reloads is always good.

 

[peeplwtchr]

Sorry to burst your bubble but 1.5 MOA load at 25 yards will need to be smaller than .375" and .75" at 50 yards. I now celebrate if I can get 1" groups at 50 yards (2 MOA) with my carbine loads.

But getting greater accuracy than decent factory ammo with your reloads is always good.

DAMMIT! I'll try bumping those up. It is a self defense gun (In Avatar), so at least it'd work for that if it had to.

Yeah, I get MOA, but wasn't thinking clearly, still in a daze from the heat all day. Crap my loads suck. Back to drawing board.

 

[LiveLife]

DAMMIT! I'll try bumping those up.

With 115/124/147 gr bullets and various powders, I struggled to produce 2" 10 shot groups at 50 yards (4 MOA) and reason why I switched the adjustable stock on my Just Right carbine to fixed stock and eventually ordered Strike Industries Viper Modular fixed stock with aluminum monopod to use as adjustable rear bag for my carbine load testing (As adjustable stock contributed to 1/2 to 1+ MOA increase in group size at 50 yards).

I am hoping to develop 2 MOA loads (1" 10 shot groups at 50 yards) when I resume my PCC testing but best of 50 yard groups different gun magazine testings were able to produce with Just Right carbine averaged 1.2" to 1.5" so I have my work cut out for me.

If you are shooting longer 75/100 yard distances, I found lighter 95/100 gr bullets pushed hard to produce smaller groups due to less bullet drop and more consistent chamber pressures/muzzle velocities with faster powders that likely burn more consistently before bolt/buffers moves back from the chamber and starts leaking gas.

Here are some of my 25/50/100 yard 10 shot group testing with 115 gr FMJ and lighter 100/95 gr bullets.

JR carbine with adjustable stock

Swapped out the adjustable stock with A2 fixed stock and group size improved

I tried to squeeze out most accuracy with max powder charge and shorter OAL

But going with lighter bullet did a better job

 

[peeplwtchr]

Have you shot known factory ammo to compare your test groups with?

If test round shot worse than factory, I would test 5.2 and 5.4 gr loads and see if group size improves.

And if following is applicable to your rounds, retest your 4.7 and 5.0 gr loads after adjusting your taper crimp die.

I think you are using too much taper crimp to indent bullets like that. Don't use too much taper crimp or kiss your accuracy goodbye as you could reduce bullet diameter and brass spring back will reduce neck tension.

Have you measured some dummy rounds (no powder, no primer) before and after feeding from the magazine to see if you can measure significant bullet setback??

For .356" sized bullet, you want to be around .378" at case mouth (.356" + .022"), essentially returning case mouth flare back flat on the bullet with slight more depending on the headstamp/thickness of case wall. (And .378" taper crimp won't hardly indent .356" sized bullet)

The .378 crimp. helped me beat good factory ammo with 5.0 gr, thanks! I also tried 5.2 gr, even better.

 

[LiveLife]

The .378 crimp. helped me beat good factory ammo with 5.0 gr, thanks! I also tried 5.2 gr, even better.

And I think you will find 5.4 gr load to be even more accurate.

 

[peeplwtchr]

And I think you will find 5.4 gr load to be even more accurate.

Yep, next week.

 

[Legionnaire]

I'm enjoying the thread; thanks. Likely going to be loading up some loads over Unique myself before long.

 

[Dudedog]

Yep, next week.

And down the reloading rabbit hole you go
Welcome to Wonderland, it's fun.