oldsmellhound
I have to agree about trying a new bullet, I have several good shooting rifles that just won't shoot that 240gr. My Triumph for instance won't but shoots 250gr and 200 gr Shock Waves 250 gr Lehigh 250 gr XTP and 250 gr Deep Curls into an inch some take a bit more or less powder and the FPB shoots best with 90 gr BH the rest will shoot an inch when I do my job and the loads vary from 100 to 120 gr of BH.
Some times the barrel whip of a certain gun and bullet are out of time with each other and all you can do is use a different bullet.