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6mm BRA primer issue

rickhirsch

My 6bra and issue when it come to firing cci 450 in the cold . i know it's getting warmer .but I don't want to
shoot two different loads .my gun is a Kelby panda and it shots great . change the spring on the firing pin
three times . it shoots br4 ok but there's always a but ! ran out of br4's . got cci400 they didn't work as well
i've always liked fed 205 match they don' shoot as good as cci 450 .this is a 600 yard gun s/d are kinded important.
can't find br4's ! so I got. rem 71/2 fed 205 m cci 400, win. WRS, so help me ??? and if I could buy br4's I would.
Oh I forgot to give my load 29.6 grains of H4895 108 GRAIN Berger . 2840 fps lower node but shoots in the 1.'s
most matches . thanks Rick
 
rickhirsch said:
My 6bra and issue when it come to firing cci 450 in the cold . i know it's getting warmer .but I don't want to
shoot two different loads .my gun is a Kelby panda and it shots great . change the spring on the firing pin
three times . it shoots br4 ok but there's always a but ! ran out of br4's . got cci400 they didn't work as well
i've always liked fed 205 match they don' shoot as good as cci 450 .this is a 600 yard gun s/d are kinded important.
can't find br4's ! so I got. rem 71/2 fed 205 m cci 400, win. WRS, so help me ??? and if I could buy br4's I would.
Oh I forgot to give my load 29.6 grains of H4895 108 GRAIN Berger . 2840 fps lower node but shoots in the 1.'s
most matches . thanks Rick
Click to expand...

That's the good node.
 
I'm shooting lapua . the miss fires come when it gets cold .cci 450's most of the time I can lift the bolt
and close it again and it will shoot. but that's no way to shoot benchrest . I don't have 15.5 but I would like to
try it . I was hoping some one was getting good s/d's with another primer . br4 are good cci 450's are better.
I Guess I'll try a 28 pound spring . panda's have a 24 # spring.
 
I did check the firing pin fall it looked like about .05 to .055 but maybe I should actually check with a
depth mic. as far the oil I used very little and it is supposed to be good to -35 degrees. I went back to
grease just little bit .so I got a priming tool that could set to a .001. I like Alex's Idea about it firing pin
it wouldn't hurt to get a new the pin is 25 years old. but it is weird that br4 work and not cci 450 won't.
federal work. and i tried three different lots of 450?
 
I am using 205m primers in my 6bra. Never had a ftf with Alpha or Lapua brass. Have major problems with premature heavy bolt lift with the Alpha brass, but it shoots as accurate as the Lapua as best I can tell. No problem with getting sub 2 inch 5 shot groups at 500+ yards with either using the 205m primers. Maybe I will try 450 and br4 primers in my quest to get it to shoot smaller. My concern is that you normally have to work the load up with the primer and I don’t want to start over again.
 
Alright, I'm gonna say it.

The biggest farce to have been sprung on the reloading industry in the last 5 years is priming tools guaranteed to seat to .001". Sure, they may all be .00X" below flush but that doesn't mean ANYTHING as far as consistency in primer seating. Primers need to bottom out in the pocket to be consistent and that may be .003 below flush or it may be .010" below flush.


Now I do not have a K&M with gauge and I honestly don't know for sure how they operate so that one, I'm not talking about.
 
LRPV said:
Now I do not have a K&M with gauge and I honestly don't know for sure how they operate so that one, I'm not talking about.
Click to expand...
I thought I was the only one. I have the same K&M sitting on the shelf. Read the directions and understand in theory how they work. Have not had time to use it.

I agree with what you are saying. The simple answer is to uniform primer pockets to the same depth. Even then, you will have some that bottom out early, especially after a couple of firings. With the 22st century primer you can feel the difference and adjust accordingly.
 
Ccrider said:
I thought I was the only one. I have the same K&M sitting on the shelf. Read the directions and understand in theory how they work. Have not had time to use it.

I agree with what you are saying. The simple answer is to uniform primer pockets to the same depth. Even then, you will have some that bottom out early, especially after a couple of firings. With the 22st century primer you can feel the difference and adjust accordingly.
Click to expand...
Feel is the key. A mechanical stop may or may not get you to where you need to be. Uniforming pockets is something that I have done since I first got serious about this stuff. Yes, even on Lapua 6BR brass. Even with uniform pockets there is difference in rim thickness that has to be accounted for in every primer tool that I am aware of. I've used quite a few priming tools over the years. I probably shot the best using one of the cheaper hand primers on the market.

In the pursuit of perfection I bought a really expensive seating tool. I got a lot of variation in seating depth with it. Then I went even farther down the bunny hole and bought some really cool doo dads to add on to it and I think that may have some merit but I have not been able to run it very much to say whether it's the answer or not, but it doesn't use a hard mechanical stop.

I should also say that I'm not convinced having every primer seated within a .001" is necessary. From what I can tell, there is a range that you need to be within but I don't know how big that range is.
 
thanks Alex any info from you greatly appreciated . in my neck of the woods most of the better benchrest
shooter's have stop shooting .due to getting old or dying .there's been a few unfortunately. or the components have got expensive and scarce. so I've been shooting about a year and a half at mid range
sometimes you just need a sounding broad .thanks to all who replied it helped . still don't why the cci 450's
don't go boom. when is cold . but i will change out the firing pin. After the next shoot .
but good news is that shot today and federal match shot very well at 100yds.I'll take it out to 600 yds next week. someone asked if the cases were new or sized they have been shoot 12 times . annealed very sizing.
thanks again Rick
 
The CCi 450s have a thicker cup. The cold congels the oil/grease, slowing the pin fall. Sounds like your ignition system is right on the edge. You ned a stronger spring or maybe detail strip your bolt asm and clean it real good. And verify pin fall! Also primers need to be seated to pre-load the priming mixture. Also if you are over sizing your brass and increasing the headspace, it will make the primer harder to set off. You don't have a primer problem, you have an ignition problem. The easy button is thinner primers, until your ignition system get worse.

Frank
 
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