Just recieved my new pistol. T.C. Contender with 16.75 inch barrel, from Bullberry Barrel Work's. 30/30 cal., muzzle break, custom wood. I would like to shoot Nosler 125 grn ballisitc tip B/T's. Any help with a starting point with load recipe will be appreciated. Some folk's I talk to suggest W748 powder. Sierra book suggest IMR4198? What do you think?