Had one put on a featherweight 7 mm mag that kicked like a mule. Now it is about like a 243. If you have one of the KDF type brakes, you should probably use it at the range and take it off for hunting to prevent the muzzle blast from ruining your ears. You could take ear plugs in the field, but I always forget. After shooting 2-3 times in the field with no ear plugs your ears will ring for a week, which probably means that it is damaging your hearing.

My muzzlebrake didn't affect accuracy, but it sure did stop me from flinching.

I have heard good things about the Gentry brake. supposed to be quieter. There is also another brake that may be even quieter, but I can't remember who makes it. Will try and find out and post it.