If you hunt where you have a chance at multiple animals from the same stand, smaller cartridges are worth considering. I noticed some years ago, I touch off an '06 case in a 22" barrel, and I wouldn't see a deer again for 2-3 days. I shot a doe one afternoon with a .300 Savage, burning 20 grains less powder, and I had a decent buck in the next morning.
The 7.62x39 obviously falls into the same category.
YMMV, of course a can further dampens noise.
Last edited by tex_n_cal; 08/31/15.
