Thread: Subsonic 300BLK Noise levels

there shouldn't be a sonic crack for a start . .. also keep in mind the surroundings your shooting in will make a big difference. Completely open areas are best, enclosed or anything that noise can bounce will magnify the sound you hear . . . and to any critters your shooting at.
Most of my shooting is in the hills chasing Goats with a .30cal subs, when the wind is right its almost silent and the biggest noise is the Wop of a hit . .. get in the scrub and there is a definite slow thump that is easily heard - remember a suppressor only slows the gas down, it doesn't eliminate it.
if i was you - if i didn't have a chrony - i would shoot a target at 100 yards, go back to 200 using the same aiming mark and shoot again, then measure the bullet drop, check that against something like Strelok or online.
as an example - mine goes like this -
zero at 50yds
-2.4 at 75
-7.1 at 100
-23.3 at 150
-49.2 at 200
yours should do better that my 197grn. flatpoints but you get the idea, it is a good method if you use good information.

good luck . . .R