Well, if you are dead set on a brake, I would opt for the 7mm, just because of ammo availabilty and price. Just keep in mind their are better options out their for you. Having hunted with a brake, I can assure you it is not at all pleasant. You need to utilize hearing protection, or damage will occur. Also, the amount of debris that thing can throw in your face is amazing, especially if you take a shot in the prone position. My wife can shoot a 270 win with an 8 pound rifle/scope (combined weight) with no problems. She doesn't shoot 100 rounds a day, but can manage ok. Another option is the 7mm in a Browning BAR. That semi-auto action is gas fed, which takes down the kick a lot. I had one in 30-06 that felt like a 243, and I imagine the 7mm would feel about the same. This was going to be the outfit I was going to buy my wife for an out of state deer hunt before plans had to be changed. Except she wanted the BAR in 270. Good luck, hope this helps. If you would like to talk to my wife about it, drop me a PM and I will have her read it and respond.