Originally Posted by
Dale53
Kevin;
We need a further clarification, here. You are correct that the .45 Cowboy Special brass headspaces on the case mouth and will work in the 1917 revolvers (and allow ejection) AS LONG AS YOU USE A TAPER CRIMP ON LOADED AMMUNITION. If, on the other hand, you wish to use heavier bullets with a crimp groove, and use a roll crimp, THEN the .45 Cowboy Special case should NOT be used in the 1917 double action revolvers (the roll crimp, while advisable with full charge heavier bullets, will interfere with proper headspace in the 1917 revolvers (in effect the roll crimp will allow the loaded round to seat further into the revolver cylinder than advisable. In effect, the rear of the case head would be further from the recoil shield than advisable.
I hope that clarifies the confusion.
FWIW
Dale53