Does anyone have any pet loads they could recommend for my Ruger No. 1 in 7mm Rem. Mag? So far I have used 57, 58, and 59 grains of H4350 with a 140 gr Siera bullet. They group o.k. for hunting but for some reason they all shoot two shot groups of +/-3/8" with the 3rd shot being 1.5 to 2 inches out. Does anyone know why that might be, shooter error, hot barrel, wood problem?
I plan to shoot a 139 gr Hornady SST bullet for whitetails.
Thanks!!