Re: bullet holes in target. (not perfectly round)
Thank you all for the input.
I think I know why I had that string of shots across the paper. For the 89 gr. load I never let the barrel cool between shots. I took 5 shots one right after the other. The barrel was hot enough where I couldn't hang on to it. I think this is an important factor in the stringy group and the yaw.
I've been shooting at the range every night this week and I decided to go against what a lot of you have told me to do. I decided to not clean the gun at all. Now don't get me wrong, I like everthing you guys suggested, but I think I might have been cleaning the gun too much to begin with. I've been using Bore Tec bore cleaner after every shooting session. So every new session I start I'm basically starting over with a new barrel that is ripping up the bullets as they travel down the barrel. It was mentioned earlier that my barrel may be hard on the bullets. So, I figured I should let the imperfections in the rifling fill in as to create a smoother surface. I think this will work to certain point.
Today after work I went to the range with a rifle that had 15 rounds through it uncleaned. I was able to achieve a .753 inch 3 shot group with this recipe.
175 gr sierra gameking
91 grains Retumbo
Federal 215 primer
The difference today was I let the barrel have ample cool time between shots, and I had a fowled (seasoned) barrel. I'd shoot one round at my target with the 7 RUM, then shoot my .22 pistol to pass the time for cooling. Thought it seemed like a logical think to do.
Now, what do you guys think about my theories here? Am I making sense, or am I just looney?