At no time was the barrel swabbed during these twenty seven shots. I have been shooting most of the rifles with a magnified scope, so I threw the Nikon 1X on the .451 White M97 and decided to see how well it held.
This is hard to admit but at 35 yards I had a hard time to focus on the white square. I was basically aiming for what I thought was the center of the white square. The cross hairs of the scope covered a lot of that area, but I did my best to shoot a group. The big difference was the small piece of red tape in the center. That stuck out like a sore thumb.
I did have to adjust the scope after shooting the first group (upper right) It was shooting to the right a little. And the center target was shot with the LEE MOLD 405 grain .457 diameter that I reduced to .451 diameter. They weigh in pure lead at 420 grains.
Overall, the rifle shot very well for it being so hot today. It was 81 degrees, and I was not letting the barrel cool. I was just out there shooting. From 35 yards, I could see the hole through the paper with the naked eye. So I never even had to go down range and check the target. I just kept shooting.