My dad has a 44 mag Henry big boy that I cannot get to shoot well at all, except for one bullet, the Berry's 240 gr flat point. The Berry's bullet can shoot around an inch at 80 yds, but any other bullet I shoot cannot get better than 2.5in at 80. The brass is starline for all of them and I put a factory crimp on all. Anybody else have a bullet that works good for their Henry?