Presently at our long range rifle club we allow the use of radial style muzzle brakes,unrestricted during benchrest match competition.. any caliber up to & including the 338LM..The side/top venting & or clamp on styles are dealt with on an individual basis..Their use is "Discouraged" by some competitors...I was tasked this W/E with formalizing a set of rules for all to vote on & abide by...I would like to keep all on the range happy..So I'm asking you guys to let me have your suggestions to a set of rules all/most can be happy with..Please "fire away" [grin] I'll keep looking in on this thread for suggestions...Thank You, Mike in Ct