ckc123, the difference between polygonal refiling and regular rifling is only going to change the peak pressure by 1 or 2k psi. The thin plating on the excel would not make any difference compared to any other plated bullet.
Hardness of the lead will make more of a difference.
Some very soft bullets, plated or not, may actually have a higher starting pressure than a jacketed bullet, because of deformation when being "jammed" into the rifling.
The information I have posted in the above several posts comes from "playing" with QuickLoad, and also going through the QuickLoad manuals and other references. Quickload can be a VERY complex program if you want to really play with it.
I don't have a pressure barrel but conventional pressure signs like primers, and also one of my guns has a fluted chamber, can give at least an indication of high or OK pressures. This has given me a feeling of confidence when using QuickLoad to develop loads.
Hardness of the lead will make more of a difference.
Some very soft bullets, plated or not, may actually have a higher starting pressure than a jacketed bullet, because of deformation when being "jammed" into the rifling.
The information I have posted in the above several posts comes from "playing" with QuickLoad, and also going through the QuickLoad manuals and other references. Quickload can be a VERY complex program if you want to really play with it.
I don't have a pressure barrel but conventional pressure signs like primers, and also one of my guns has a fluted chamber, can give at least an indication of high or OK pressures. This has given me a feeling of confidence when using QuickLoad to develop loads.
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