I wanted it for hunting and to reduce recoil on my lightweight 300 win. The brake is deafening. My wife and I share the gun while hunting. Animals run out of nowhere and I don't want to miss a shot cause I don't want to go deaf. Hard to put in ear pro quickly. That was the plan. Also don't want an enormous barrel walking through the timber.
Ended up that I got it just prior to the season starting. I tried it and it increase my pet load from sub half minute to 1.1 minutes. I didn't have time to do list development again. Recoil was increased pretty good and I thought it wouldn't be ideal for my wife. So I said we'd use electronic hearing protection with the brake. Since then, we've gotten pretty used to it and I've never revisited load development etc - building a house equals no time.
So how would my 5"ultra be on a 8" 300 blk?