I've run a lot of subsonic through HVTs, TPRS, and some through the SANDSTORM cans, in both 7.62x39 as well as 7.62x51. Mostly EBR with some Swiss, TTI, and non-commercial loadings. In my opinion, EBR has it down better than anyone else. They've done the research and probably knocked the end out of a few suppressors on the R&D path leading to the best sub ammo currently available - if you want to play around and make your own loadings, I don't discourage it, but be aware of what you're getting into.
I just had a gentleman call today asking what it might cost to repair an endcap strike that ensued in the pursuit of mixing up the perfect subsonic handloading... It didn't sound bad, probably just one of those "door dings" of life in the suppressor/reloading world, but squibs, unstable projos, low-speed deflagration, etc. are all part of the learning curve...
I'll tell ya though, I recently got my first AK47 in fifteen years and it cycles sub EBR with an HVT mounted, which was a neat surprise... I assume that the cost of sub vs. super gap has narrowed in the past few months, so if you haven't played around with the EBR, it's a real treat.
All this said, I'd call EBR and ask them - they're the ammo guys, let them know your twist rate and barrel length, and they should have the answers as to the right ammo from their catalog would be appropriate.
Kel
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