CharlieBrown17 said:
I agree with you on 5.56 in a 30 Cal can. Was mostly using that comparison for academic purposes.
Also agreed that suppressors only do so much for a supersonic round.
I've been reading a bit and there's not many people running subs in 7.62x39. Seems like it would be easy to do though.
Most people aren't going to run subs in a 7.62x39 because about 99.99999% of the firearms made for that round are semi-auto operated, and subs aren't going to cycle the bolt. So you have a very awkward bolt action gun that, generally speaking, isn't super accurate - there isn't much justification to go down that road IMO.
If you want to knock the sound down, which you can absolutely do with a decent to good suppressor, and make it hearing safe and much more pleasant to shoot, they are as good a candidate as any. Recoil reduction would be a great benefit as well as every AR or SKS I've bought has a funky kick to it that makes quick and accurate follow up shots difficult.
The .223 is in the same boat with AR's - a supressor's purpose on that platform is to knock an insanely loud report down to a very tolerable report. I suppose you can argue muzzle flash and recoil mitigation as well, but it's marginal on an AR platform, at least in .223. Can't speak for 6.5, 6.8, .270 AR, .30 AR or any of the wildcat calibers that seem to be introduced on a weekly basis.
Subsonic rounds are largely overrated. Sure, it's fun to pull the trigger and get almost no sound at all and have the impact of the round on target louder than the actual firing of the gun, but real world applications of subsonic rounds are honestly limited. Your range is VERY limited with subs - with a .22 on small game you really have a 50, maybe 75 yard limit. With a .223 you are limited to well under 100 yards on medium game. What makes the .300 BO actually fairly useful as a sub is sheer mass - a 220 grain projectile, even moving relatively slow, still carries a pretty good punch. So you can actually take larger game with it (deer, pig) within a limited range (around 100 yards, probably less).