I have been shooting a 300 grain sabot with 100 grain load of Blachorn 209 out of my Traditions Vortec. Actually had the screws in my scope base break off in the gun, but I think it was just faulty screws. Was told at local gun shop this was a little much, both sabot and load. Should I reduce to a 250 grain sabot and 90 grain Blackhorn?