300 Black out & 10 mm

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knockonit
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300 Black out & 10 mm

#1

Post by knockonit » June 7th, 2019, 3:23 pm

so who is rolling their own in this round, as i 'm just getting into this, am on the look out for a recipe that has success and some history, no pre requisite for recipe, just history and likes, dislikes ect.

happy friday
Rj



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shooter444
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Re: 300 Black out & 10 mm

#2

Post by shooter444 » June 8th, 2019, 8:05 am

When I got into loading 300BLK, I did a fair amount of research and came to the conclusion Acurate 1680 would be a good place to start. Other than being really, really, fine ball powder (messy to measure with my system) it worked out well enough that I stocked up and haven't looked elsewhere.

I put a 10.5" pistol upper on a Bushy lower I built just for my load development, which I produced chrony results of around 1,400 FPS for Hornady 220 (?) grain FMJ and my cast lead projos at just over 200 grains. The 300BLK is a weird little bastard, to me! I found that compressed loads didn't work well for me, and less than full capacity resulted in subs that I didn't like either, so, loading just to the bottom of the bullet resulted in perfect reliability, lighter recoil, lower noise and excellent penetration.

PENETRATION being my main objective!

A really nice format for work around my hobby ranch,... your desires may differ, and, your results may differ as well. 8-) All the best to you!
"We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness." ... Declaration of Independence

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Racewin
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Re: 300 Black out & 10 mm

#3

Post by Racewin » June 9th, 2019, 9:21 am

I've seen Hodgdon Lil'Gun work really well in 300 Blackout

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muta4warrior
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Re: 300 Black out & 10 mm

#4

Post by muta4warrior » June 10th, 2019, 11:32 pm

knockonit wrote:
June 7th, 2019, 3:23 pm
so who is rolling their own in this round, as i 'm just getting into this, am on the look out for a recipe that has success and some history, no pre requisite for recipe, just history and likes, dislikes ect.

happy friday
Rj
For subsonic Blackout I run AA1680 with Barry's 220grn plated bullet out of an 8" suppressed Noveske barrel.

For supersonic Blackout I ran W296 (H110 is almost identical powder to W296)) with 115-125 grn assorted bullets out of a 16" Ballistic Advantage barrel with pistol gas. (I have since got out of the supersonic Blackout for the 7.62x40WT to fill that roll)

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shooter444
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Re: 300 Black out & 10 mm

#5

Post by shooter444 » June 11th, 2019, 6:51 am

I believe, as muta4warrior has inclined,... 300BLK seems to have it's idiosyncrasies when it comes to supersonic RELOADINGS and other calibers would probably be more productive, for that need. At least, that is what most of what I have read over the years seem to hint at, from many different reloaders.

I forgot to mention earlier,... other than powder choice,... I have found using a LONG SPIRE POINT bullet is an absolute must requirement. I fooled around with a few other profiles with no good results. Oh, I also found that polishing feed ramps can add to feeding dependability, but, reading other loader's remarks, it seems to have more to do with who made the barrel. Some do fine,.... some don't.

I decided to go the middle ground, not supersonic, and, not subsonic. I don't supress anything, so, I have no need to stay below 1,100 FPS. At around 1,400 FPS, I get to load A1680 up to the bottom of the bullet, I like FILLED CASES, and A1680 does it for me with 200 grain plus projos. But, I only use 300BLK for varmints on my place, closer than 75 yards. So, my main requirement of this caliber, like I posted earlier, is penetration. I live in the middle of a desert area, so through and through shots are not a safety issue, for me.

I posted a video from Youtube awhile ago, about 300BLK SUBSONIC penetration, I'll post it again,...

"We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness." ... Declaration of Independence

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deanq
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Re: 300 Black out & 10 mm

#6

Post by deanq » June 12th, 2019, 7:11 am

Load strictly sub-sonic, suppressed. 190-220 gr bullets. AA1680, T-680, IMR-4227 all work for me. It's a different beast for sure. Seating depth has a larger overall effect than any other caliber I've reloaded. Who woulda thunk? :) If your loading subs, work your loads "down", not "up".

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