Here's an idea of what kind of profiles you will see between these samples of different 6.5 Grendel barrel lengths.
16" Lilja with A2
vs
12" Suppressed with Ultra 5
18" LaRue/TranQuilo brake
vs
12"/Ultra 5
16" Lilja with A2
vs
12" Suppressed with Ultra 5
18" LaRue/TranQuilo brake
vs
12"/Ultra 5