Jesse Heywood
05-21-2019, 12:35 AM
One of my recent finds is a Colt New Service in .45 Colt. Included is a cylinder for .45 ACP.
Slugging the barrel shows a diameter of .455 with groove diameter of .443. Both cylinders have throats of .455. So far so good.
For boolits I have Missouri Bullet .455 Eley, 262 gr. RNFP, BHN 12, that are running .456-.457 after I sized with a Lee .457 die. I have loaded some of these in .45 Colt, but haven't been able to get to the range with them.
I am wanting to load some .45 ACP, but cannot get the case diameter below .481 with this boolit. Cylinder diameter is .479. So I need a boolit sized .452-.453.
So, if I use a smaller boolit, how much expansion can I expect to seal the bore? And how soft of an alloy would be needed? Or, am I overthinking this?
Slugging the barrel shows a diameter of .455 with groove diameter of .443. Both cylinders have throats of .455. So far so good.
For boolits I have Missouri Bullet .455 Eley, 262 gr. RNFP, BHN 12, that are running .456-.457 after I sized with a Lee .457 die. I have loaded some of these in .45 Colt, but haven't been able to get to the range with them.
I am wanting to load some .45 ACP, but cannot get the case diameter below .481 with this boolit. Cylinder diameter is .479. So I need a boolit sized .452-.453.
So, if I use a smaller boolit, how much expansion can I expect to seal the bore? And how soft of an alloy would be needed? Or, am I overthinking this?