Campro small pistol primers

[mac100]

Yup, there is a reason spec sheets measure the cup only.

Yes I didn’t measure without cup, but man these go in hard and require a ton of force to fully seat and even then they still are just flush because I actually flattened the primer to prevent protrusion. My brass is range brass mixed head stamp and never had this problem before with the same equipment and procedures. Hers the lot#

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[mac100]

Same problem as 9mm casing. Left one is Campro SP in 223 and right one Remington 6-1/2.
Super hard to get it to seat with tons of pressure. Notice that it’s flush and flattened and Remington is 0.014 though below.

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[mac100]

I was hoping I wasn’t the only one with this problem because I’m sure it’s not related to anything I’m doing or the cases I’m using. Maybe I have a lot# that is slightly out of spec.

 

[catnip]

When measuring height, are you measuring the actual cup, or top of the cup to the anvil? The anvils usually protrude from the cup and are "set" when the primer is seated in the case. The amount of anvil
protrusion can vary a bit.

Auggie D.

Yes, measuring overall height. sami specs list the cups as the same dimensions on the outside, both height and diameter. In my experience the anvils protrude more on the rifle primers than on pistol. This may simply be due to a difference in the thickness of the material used for the cups themselves, all other things being equal. CCI lists .005 " difference in cup thickness depending on the type of sr primer alone. Anyway, just a thought that flitted through my ears. One other thing while I'm here, this could also just be a case of min. dimension primer pockets and primers that are at maximum dimensions.... catnip.

 

[mac100]

Yes, measuring overall height. sami specs list the cups as the same dimensions on the outside, both height and diameter. In my experience the anvils protrude more on the rifle primers than on pistol. This may simply be due to a difference in the thickness of the material used for the cups themselves, all other things being equal. CCI lists .005 " difference in cup thickness depending on the type of sr primer alone. Anyway, just a thought that flitted through my ears. One other thing while I'm here, this could also just be a case of min. dimension primer pockets and primers that are at maximum dimensions.... catnip.

The length is not the part that bothers me the most. It’s the fact that it’s a hard go the entire way seating them. Like they are just wider than other primers and the caliper shows it is. Just as hard to get them to go in the rifle case as well

 

[hatman1793]

I have had no issues with the Ginex primers. I would easily use them over S&B stuff.

 

[Otto V]

A couple friends and I buddied up on an order of components from Tenda (to get free shipping) . . . we each got one carton of the CamPro/Ginex small pistol primers. I've only used 1 package so far, and I also noticed they took much more effort to seat than Winchester or Federal primers. I'm using Blazer brass and a Dillon 450 press. One of my buddies also mentioned that they are very hard to seat, he is using a Dillon Square Deal, not sure what brand of brass he's using.

 

[catnip]

The length is not the part that bothers me the most. It’s the fact that it’s a hard go the entire way seating them. Like they are just wider than other primers and the caliber shows it is. Just as hard to get them to go in the rifle case as well

It would be interesting to mic the primer pockets and some other brands of primers, if you have access to any. This sure smells like something is not at the right dimensions. One more errant thought... are the front edges of the primers nice and smooth or maybe left rough and badly finished? Kind of grasping at straws here, I know, but machines do wear and get out of spec. Might be you just won the lottery ,and got a bad batch before they were found ...catnip