03-28-2012, 01:15 PM
I have ran reloader 7 in my 300aac and it is very quiet. Don't know what that would be in the Grendel as far as case load density but it is really quiet. My load was 10.3 grains. Like stated start high and reduce!!! Also remember what is quiet on a cool day may go trans sonic on a warm to hot day. My target velocity is between 1000fps to 1025fps max. Up here in Pa we have a large temp swing and I want a loading that works in any temp I encounter. L had loads go super sonic just from setting in the chamber and absorbing heat from previous fired rounds.