Sub sonic 7.62x39 questions

[Great-Kazoo]

here's a discussion on this subject.
https://www.theakforum.net/threads/s...opment.238569/


Here's a link for x39 load data.
https://shootersreference.com/reloadingdata/762-x-39/

IMO it's not so much the weight of the bullet as it is how many Feet Per Second you're getting. Keeping it @ 1100 or slower works. 1100FPS gets a little louder report, suppressed.

First thing you need to do, if not done already is. Check bore to make sure it's concentric to avoid baffle strikes.

Titegroup and trailboss are my 2 go to powders for sub sonic handloads. I see Accurate 5744 and Accurate #2 are showing the 1k fps range. While i have not tried reloading x39 subs, i've done 223 and 308's.

The 223 with a 12" drop @ 100 yds (1:8) bbl was dismal. I see the load data for sub 223 is using a 1:12 twist rate, which i'll eventually buy.

The 308 is 14 gr TB using a 147 or 150 gr fmj hornady bullet, 1:12 LTR rifle. That sounds like a suppressed 22 with minimal drop @ 100 yds.

I'd be curious what results you see, depending on bullet weight and powder.

IMO with the average twist rate of 1:9.5 for an AK, Or 1:10 with a US bbl, lighter bullets will net better results. Those heavy bullets drop substantially @ 100 yds.
Whatever you do, run it unsuppressed @ 50 then 100 yds to see if your rounds are tumbling / keyholing.



SInce i have the powders i suggested, along with brass, bullets and dies. I might venture into loading some subs, as well.