Crown and muzzle uniformity is always the first suspect, I have never had issues with Winchester White Box ball, and while it can't be ruled out, check the muzzles first. Those .45 tubes are thin and can be bent or deformed more easily than most folks realize.
Thom. . .
"The only REAL safety is between your ears. . ."
Once a Marine....... wrote:After all we do have plenty of room for all of Gods animals......... right next to the mashed potatoes!