I am staring my first true custom build and looking for a little advice. The rifle is starting a Pierce custom action L/A repeater, this will be placed in a Accuracy International AX chassis. The rifle will be a 300 win mag with a Broughton 26" 1-10 twist with 5C rifling. The gun will have a 30 moa with 30mm TPS rings and Leupold Mark 4 6.5-20 with TMR. I am beginning long range tactical competition and I am looking for a muzzle brake which will aloow me to see my splash at long ranges. I am also trying to decide which reamer I should use to shoot factory 190's and reloaded 208's