CCI #41 Observations

[AccelR8]

Just passing this along to anyone who might be interested.

I got some CCI #41 primers to try. Never used them before. I selected some Lake City brass that I had bought as processed (crimp removed) and I had already loaded once and fired with CCI 400's.

The #41s were VERY hard to seat, so much so that I thought I might break my hand priming tool. I switched to my bench tool and some of the primers required so much force I stopped. The dozen or so cases I did prime, many of the primers were high and many were visibly flattened to some degree. My primer pocket go-no go gauge would enter the pockets easily on the go side, the no-go would not enter. Go side is .1730, no-go is .1740.

I had to cut each and every primer pocket with a uniforming tool in order to get proper seating nd normal seating force. I mic'ed a couple of the primers and they measure .1759-.1760 in diameter.

 

[rijndael]

Might be useful to extend the life of brass with pockets that have opened up.

 

[NorCalMikie]

Primer pockets with the "crimp" removed? Pockets needed to be uniformed/reamed.
Been there, done that for my M1A. Out of maybe 2 thousand rounds, only a VERY few primers got damaged and ALL seated below the head surface. That point is CRITICAL on a M1A. Burn em if you got em. 20 rounds at a time.

 

[std7mag]

Have had zero issue with them in new PPU brass for my 30 Carbine.

 

[AccelR8]

Primer pockets with the "crimp" removed?

Meaning swaged, or whatever the processor/supplier does to the fired brass before he/she sells it to...me.

 

[Minshooter]

Once shipped a batch of LC 5.56 for conversion to 300BO, including crimp swaged/removed.
Every one of them came back insufficiently swaged.
Ran them all through the Dillon 600 and they were good.
Right tricep now slightly larger.
#41's were nicely snug, but seated perfectly.

 

[JB10]

I use a lot of #41 and LC brass. Never had that issue

 

[Bill K]

Same with me, but then again, I make sure the primer pockets are prepped and any crimp reamed out.

I use a lot of #41 and LC brass. Never had that issue

 

[snert]

Ditto

 

[danny]

I had to cut each and every primer pocket with a uniforming tool in order to get proper seating nd normal seating force. I mic'ed a couple of the primers and they measure .1759-.1760 in diameter.

You should be doing that for every case, every time, and for every kind of primer you might seat. Primer pockets need to be deep enough to fit a primer. Primer pockets change over the life of a case. There are no shortcuts.

Danny

edit: 90+ percent of the time when I uniform a primer pocket I am skimming at least some material out, re-establishing factory design depth (proper depth). This happens throughout the life of the case.

 

[AccelR8]

You should be doing that for every case, every time, and for every kind of primer you might seat. Primer pockets need to be deep enough to fit a primer. Primer pockets change over the life of a case. There are no shortcuts.

Danny

edit: 90+ percent of the time when I uniform a primer pocket I am skimming at least some material out, re-establishing factory design depth (proper depth). This happens throughout the life of the case.

Years ago I had bought one brand of uniforming tool and it never touched the bottom of any primer pocket I used it on so I came to the conclusion this was an uneeded step. This time, I bought a different brand tool. Lo and behold, it cuts at least a little on every pocket even on brass where primers seat easily. Lesson learned!

 

[danny]

Years ago I had bought one brand of uniforming tool and it never touched the bottom of any primer pocket I used it on so I came to the conclusion this was an uneeded step. This time, I bought a different brand tool. Lo and behold, it cuts at least a little on every pocket even on brass where primers seat easily. Lesson learned!

I have gotten a defective primer pocket uniformer. It was too short. It got replaced under warranty, so that is something to check.

Danny

 

[Bc'z]

Even virgin brass needs a lil lovin in the pockets.
This shaving pile is from 50 pieces i prepped on Saturday.

 

[Larryh128]

Just passing this along to anyone who might be interested.

I got some CCI #41 primers to try. Never used them before. I selected some Lake City brass that I had bought as processed (crimp removed) and I had already loaded once and fired with CCI 400's.

The #41s were VERY hard to seat, so much so that I thought I might break my hand priming tool. I switched to my bench tool and some of the primers required so much force I stopped. The dozen or so cases I did prime, many of the primers were high and many were visibly flattened to some degree. My primer pocket go-no go gauge would enter the pockets easily on the go side, the no-go would not enter. Go side is .1730, no-go is .1740.

I had to cut each and every primer pocket with a uniforming tool in order to get proper seating nd normal seating force. I mic'ed a couple of the primers and they measure .1759-.1760 in diameter.

I would question that all of the crimp was removed. I use 400's, 450's and #41s. Never had a seating issue with any.