If no muzzle brakes, what about suppressors?
If you have paper work we don't care what you shoot, but it will be along drive for you!! For official NRA matches there are no suppressors allowed.
I believe a forum member named Milanuk lives up close to you, as does Guy M. They shoot F-class and Highpower and would know more about the rules of the matches in your area.
Unless you are going to come down often to shoot rec fire, I am not sure it is cost effective to be a member. You are charged the same amount to shoot a match irregardless of membership. A lot of us got very tired of the QSC giving us the short end of the stick and went and elected officers from the F-class shooters so we are now going to be a more mainstream segment of the shooting than the orphan stepchild we were.
On rec fire (practice) days the cost for a nonmember is $10, so you would have to really come down a lot to recover your costs. I don't even know why I stay a member except it supports the organization.