I have a .45 Colt Ruger Bisley that I enjoy shooting. Lately I've been shooting Lasercast .454" 255-gr SWCs, bevel-base. I bought the .454" because the .452"s were out of stock at the time I ordered.
About a month ago, I reamed the cylinder throats with a tool from Brownells. When I most recently took the gun to the range, it seemed leading may actually have gotten worse. It's all in the barrel a short distance after the forcing cone extending maybe 1-2 inches, mainly collecting on the raised flats of the lands and in the corners of the grooves. I've never really paid particular attention to leading in my guns as none of them exhibit it too badly, but I thought I remembered the leading usually occurring in the grooves, not on the lands itself. In this case almost no lead was present in the actual grooves themselves, besides at the corners with the lands.
The gun has maybe 1500 rounds through it, mostly cast with few or possibly even no jacketed bullets through it. Most have been H-110 Ruger loads up until recent experimentation with Unique.
The load is a mid-level load of 11 grains Unique. I only put around 80 rounds through it since the last cleaning. Can anyone think why it might have gotten seemingly worse or why it would be leading on the lands? I have read before the Unique burns hot. I also know that Lasercast bullets are typically very hard, and probably too hard for the velocity/pressure I am producing. Maybe rather than cutting into the hard bullet, the lands are swaging in rounded-edge creases that aren't sealed well?
I'm hoping the problem does not call for lapping, as I don't want to keep having to put money into this revolver.
About a month ago, I reamed the cylinder throats with a tool from Brownells. When I most recently took the gun to the range, it seemed leading may actually have gotten worse. It's all in the barrel a short distance after the forcing cone extending maybe 1-2 inches, mainly collecting on the raised flats of the lands and in the corners of the grooves. I've never really paid particular attention to leading in my guns as none of them exhibit it too badly, but I thought I remembered the leading usually occurring in the grooves, not on the lands itself. In this case almost no lead was present in the actual grooves themselves, besides at the corners with the lands.
The gun has maybe 1500 rounds through it, mostly cast with few or possibly even no jacketed bullets through it. Most have been H-110 Ruger loads up until recent experimentation with Unique.
The load is a mid-level load of 11 grains Unique. I only put around 80 rounds through it since the last cleaning. Can anyone think why it might have gotten seemingly worse or why it would be leading on the lands? I have read before the Unique burns hot. I also know that Lasercast bullets are typically very hard, and probably too hard for the velocity/pressure I am producing. Maybe rather than cutting into the hard bullet, the lands are swaging in rounded-edge creases that aren't sealed well?
I'm hoping the problem does not call for lapping, as I don't want to keep having to put money into this revolver.