CCI 250 mag primers not igniting?

[elmerdeer]

Here is the problem I ran acroos today, I have 2 times fierd brass that was going on 3rd firing today, they were PFL resized.
This brass fired some loads that had pressure signs, Ex:extracter marks and slightly sticky bolt once in a while. I did back down from those loads some.
So here is what happened today I loaded some of my favourite loads and tried them with the cci 250 mag primers instead of the fed 215 primers. I did back down first and worked my way up, Now withe the origianal primer fed 215 mag they would always fire, with the cci I had 20 out of 45 rnds not go off, now I am wondering what could it be? Did I trash my brass by shooting hot loads, but my primer pockets are still pretty tight.
My action is a Stiller Predator, my caliber is 7mm Dakota, and my brass is Norma.

1) Is my brass the problem? Primer pockets are still pretty tight.
2)Are the cci 250 mag primers different in size, height, width, to make my firing pin not strike them hard enough?
3)How deep should primers be seated? I always seat primers with my rcbs hand primer and after the first squeeze I rotate the brass and squeeze again, never had a problem doing it that way before.
4)Can ther be something wrong with my firirg pin?
Thanks
Elmer

 

[Mikem]

Elmer, I'm no expert in primers, but in reading your post, I wonder about a couple of things. On the rounds that didn't fire was the primer struck the same as on the rounds that did fire?
Ill give my opinion on your questions by there number.
1) Not likely
2) No
3) until they bottom out in a clean pocket, and below the base.
4) yes
Just my opinion, I have never had a FTF, and have been reloading since 1965, just lucky I guess. Hope this helps.
Mike.

 

[blawton]

What kind of powder are you using?
What caliber and how much are you loading, what bullets?
Did anything happen to the primers that might have caused this? ie get wet..
Do you get a consistent strike on the primers?
Did you make sure that you didnt bump the shoulders back to far when you fl sized them?
Do you ream the primer pockets out?

There is more then a few reason this can happen you just have to eliminate them untill you find it.

 

[elmerdeer]

What kind of powder are you using?
What caliber and how much are you loading, what bullets?
Did anything happen to the primers that might have caused this? ie get wet..
Do you get a consistent strike on the primers?
Did you make sure that you didnt bump the shoulders back to far when you fl sized them?
Do you ream the primer pockets out?

There is more then a few reason this can happen you just have to eliminate them untill you find it.

retumbo
7mm Dakota , 180 bergers, 175 sierra
No
Yes only bumped .002'
No
and Well I checked the firing pin, I checked to see if trigger sear was slowing down the firng pin,and i also checked the depth my pockets in all my brassfired and new everything is the same, so then ,I thouhgt i had seated them to deep but I seated some in new brass and chambered and fired five rnds and those went off, next I pulled about 10 rnds that had not fired and chambered those and pessed the trigger 3-4 times on each and made the primer look like a crater and they still didnt go off, so I am starting to think that its the primers, they're no good.
Elmer

 

[blawton]

That does sound to be the problem I run 78 grain of retumbo in the 30 dakota i have and the 250 never had any problems. I did switch to the 210 because i had vertical problems and that solved it without any issues.

 

[Mikem]

Elmer, if you went back and retried some of your FTF rounds, and after several pin strikes you got a good crater in the primer, you have bad primers.
The powder or bullets haven't anything to do with your problem. If a primer goes off, but doesn't ignite the powder charge, the primer will still push the bullet out of the case and part way down the barrel, where it will be stuck.
Good Luck.
Mike.

 

[elmerdeer]

Elmer, if you went back and retried some of your FTF rounds, and after several pin strikes you got a good crater in the primer, you have bad primers.
The powder or bullets haven't anything to do with your problem. If a primer goes off, but doesn't ignite the powder charge, the primer will still push the bullet out of the case and part way down the barrel, where it will be stuck.
Good Luck.
Mike.

Update, i could'nt resist I took a hammer to the primers that did not go off and guess what, they went bang! I geuss its a firing pin issue and not the primers.
Elmer

 

[blawton]

If your protrusion is around .062" and if the pin it tight in the hole then it has to be a spring issue or a sear/cocking dragging issue. I get the spring kits from brownells and mess with them till i find just the right one. If you have put a new one in lately then try the old one and compare.