Crown question on new 627 PC

[FivePews]

Once, maybe twice (?), I had to remove the C&S extended firing pin I installed because the nose of the FP would hangup in the primer, after firing, & you couldn't cock the hammer for the next shot as the cylinder wouldn't rotate.

After a couple attempts at cocking the FP would release & operate normally. The primers weren't getting pierced but the FP impact was deep.

Going to a shorter FP eliminated the problem in that revolver. In others the C&S worked fine so it just depends.

.

More good stuff. I'll pay attention to the primers when I give it a go (and start slow).

 

[Protocall_Design]

The minimum firing pin length for reliable ignition (in my book) is .495. For non magnum target loads, my ideal fp length is .505. There are many variables that come into play here, such as endshake, headspace, primer seating depth, rim thickness, fp protrusion, etc. Every individual gun has a different combination of these factors at play, due to + or - manufacturing tolerances.

The longer ones make up for a lot of these variables, but can get stuck in a magnum primer once in a while, as the primer will flow around it under high pressure. The primer in a target load deforms, but doesn't flow.

 

[kaaskop49]

Post #13 mentions "light strikes." Is the strain screw fully tightened?

Kaaskop49
Shield #5103

 

[FivePews]

Post #13 mentions "light strikes." Is the strain screw fully tightened?

Kaaskop49
Shield #5103

Yessir! I checked it during cleaning after the first range session.

 

[FivePews]

Well, the new firing pin at .505 may have worked out. I put 200 mid-level .38 reloads with CCI #500s through the 627 PC yesterday and had one light-strike right off the bat (could have been the reload). None after though. Probably 80% double-action shooting (which was the worst for light-strikes last time). No problems with cylinder rotation while shooting. Cool!

I'll trust that it's fixed if I can get through 500 rounds without another dud.

But, no more info about .357 mags hitting to either side because I'm too lazy to move my dies.

As an aside, I'm really getting sick of changing my XL750 dies back and forth between Mags and Specials. Time to order another .38/.357 changeover rig from Dillon to make this easier. Probably a third rig for wadcutters too.