I came up with a question about my 336C .35 Rem after shooting about 20 rounds through it. Why does it walk my 180 grain loads all over the paper after 4 or 5 rounds but then hold all the 200 grain loads inside 2 inches no matter how many are fired? My 180 grain load is the Speer 180 FN over 37.5 grains of H4895. My 200 grain load is the Hornady 200 RN over 35 grains of IMR3031. Both with Rem. brass and WLR primers. I use Lee dies with the factory crimp die. The first three 180 gr. rounds were all cutting a clover leaf but walked after that. The 200 gr. rounds always held inside 2 inches even after 10 rounds. I had a good day at the range as both the 35 Rem. and my 44 mag. 1894 marlin held inside 2 inches. The guy next to me was shooting a Win. 70 Featherweight 30-06 and me and my Marlins were way more accurate.