If your gun has an extended firing pin, and a strong hammer/striker spring, it will usually ignite even very hard and/or high primers (not fully seated). Eg my CGW Prograde P-07s will ignite even weakly seated CCI 41 military rifle primers, with a not so heavy hammer spring.
Last edited by Clusterfrack; 12-30-2019 at 10:43 PM.
“There is no growth in the comfort zone.”--Jocko Willink
"You can never have too many knives." --Joe Ambercrombie
I've had zero problems with recently manufactured CCI SP primers. In the immediate aftermath of the great ammo shortage I had some problems with CCI, and a whole lot of problems with Winchester.
Are you shooting DA, SA, or both? Have you tried them in auto pistol ammo?
"Gunfighting is a thinking man's game. So we might want to bring thinking back into it."-MDFA
Beware of my temper, and the dog that I've found...
Double action. No issues with autoloaders using the same primers. I checked primer depth and several of the guys here were on the money. Many of the primers were not fully seated. I ran a couple hundred back through my Hornady hand priming tool and found I had to squeeze the very bottom of the lever quite hard to get additional seating depth which did leave minor impression marks of the primer face. The depth change is more noticeable by feel than sight. I will see if this makes a difference on the range. I have some pretty significant grip strength so I wonder if it's not time to replace this tool. I should not have to squeeze this hard to get full seating. On a conservative guess I say it has primed 12K rounds.
Last edited by Nightvisionary; 12-31-2019 at 01:16 PM.
Somebody mentioned headspace. That cartridge is flopping back and forth in a revolver chamber, while the breach face holds it in place with every other type. Also it's more possible to have gunk in the front of the chamber preventing the round from fully seating until it is whacked by the firing pin. Revolvers can be tricky.
Revolver shooters from the past have found that Federal primers with a crush fit are the most reliable. CCI primers have been known as the hardest to set off in lightened actions. Chambers must be perfectly clean. Many revolver shooters seat their primers to look physically slightly flattened.
“There is no growth in the comfort zone.”--Jocko Willink
"You can never have too many knives." --Joe Ambercrombie
And there are variances between primer pocket dimensions as well as primer dimensions. I've also seen primer pockets that are tapered slightly to the bottom. Now couple this with CCIs reputation for producing slightly larger diameter primers. I know this to be true because I've purchased CCI primers in the past because they are larger, and I could get maybe a couple more loadings from some of my brass. So the OPs cases could have some bearing in this issue as well.
https://ballistictools.com/articles/...d-diameter.php
SAAMI small primer specs: .1745 to .1765 diameter, .115 to .126 height. Primer pocket specs: .1730 to .1745 diameter, .123 depth. It looks like primers are expected to be a crush fit in the pockets. Quite a range for something so small.
See page 26 for SAAMI primer pocket specs, the file won't let me cherry pick just one page: https://saami.org/wp-content/uploads...sting-Copy.pdf