About a year and half ago i bought/ ordered a rossi 243 with a bull barrel. I put a bushnell scope and some steel rings on it. A few days later i went shooting, I had some reloads (cant remember now) and i fired 6 shots through it, it took 4 to sight in and the other two was to just play around. But it grouped just fine for me and that was the only time i shot it. A few months later i got a model 70 223 wssm, so i traded the rossi to a buddy of mine. Then he put a simmons scope on it and i dont know what kind of rings. But then it started shooting all over the place. 5-6" groups. So he changed the scope to something else and tried 4 or 5 different types of ammo and i still done it. he always cleaned the barrel spotless every time and that still didnt help. So he then took the gun to another guy that we worked with that did the reloading and also was a gun expert. He put his new nikon scope and leupold rings on, made sure everything was tightened down, cleaned the barrel, and used his own reloads. And the rifle still shot terrible!! The rifle didnt have no play in it and everything on the rifle was fine, the riflings wasnt boogered or nothing!! But the rifle shot perfect with me, never could figure out was wrong with it, nobody could. the guy ended up trading the rifle but it just has me puzzled. What could of cause that? That was the only rossi i ever had, so i dont know much of nothing about them. Any ideas??