I'll step in front of this train! I haven't had one complaint with my KDF muzzlebrake on my Sako TRG-S/Lazzeroni Warbird. When at a range I simply "warn" everyone and they seem pleased I gave them a heads up and they ALWAYS gather around to watch this thing they have heard so much about. The one thing I can't understand by the negative folks is why are they so bad on the range in the first place? EVERYONE already has hearing protection on, if they don't then they have already ruined their hearing over a lifetime of stupidity than anything I can do with a single rifle and a couple of shots!!!

The brakes are great for "watching the shot" as a properly built brake will actually allow you to keep trained on the target and watch for the bullet strike. You can't even do that with an unbraked 30/06 in reality, so how is that a negative? I have tested mine and the zero is absolutely unchanged with the brake or without it. If I am going to have to shoot it around someone without protection I just unscrew the brake and "take my punishment like a man" lol. I haven't lost game with this beast but if I had to wade into the brush after something I would simply unscrew the brake in put it in my pocket.

My brother and I hunted in WY lastyear for mulies and lopes. When I was shooting they simply stayed behind me about 10-15 yds and didn't complain about the noise. My brother had a camcorder and the guide was watching through his binoculars. The guide thought the gun was awesome and his only request before hearing it fired was, "please warn me before you torch that mother off". After he saw it fired while standing 10yds or so behind me he wasn't the least concerned afterwards.

For any supermag I would recommend them. For extremely light (under6#s)regular mags (including the WSMs) I would also recommend them. But again I would only recommend the easily removable versions or in the case of the BOSS rifles just be sure you packed the CR module. A brake also plays hell on a scope, be sure you have a top quality scope (VX2 or +, Conquest, Monarch or better) a big blasting magnum brake will SHELL a Tasco or Bushnell doubletime.

Another thing I really like about the brake is it eliminates muzzle jump/climb. That's something to consider if you hunt from shooting houses or rigid blinds much. I do and without it my scope would be beat to death on the top of the window sill each time I fired it. I hunt with Game Ear 2s in anyway. I carry a spare pair of shooting muffs for anyone (including my kids) if they are going to be in the stand with me.

They are well worth it in my opinion, but then again that's only for big kickers. My 7mags don't have them and I don't feel they need them. I recently got a 300Wby Mag as well and if it weren't an heirloom and I was going to use it much I would have a brake put on it as well.

Good luck,
RA

ps
I DESPISE Magnaported or anyother ported barrels for just the reasons I gave you. You can't unscrew them or otherwise "shut them up" you are stuck with them.