I've decided to try out a Muscle brake on a new Rem Sendero 7mm rem mag. I know the Sendero barrel is .820 at the crown. I'm trying to decide which size brake to order. For those of you who have the Muscle, which size did you go with? From reading about them it seems a mini mag or original 3 port would work? I would prefer a round brake that matches the barrel countour but I'm told not to turn down the muscle brake. So I'll probably go slabbed? What did you go with? Why? If you have pictures that would be great. Anything with a Sendero would be great. Thanks