Pierced primer question

[watercam]

No, send your bolt to GreTan and have the pin turned down and bolt face bushed. Just as Laurie mentioned above and what I did when I went to Lapua SR Palma brass in my Winchester Palma gun. Not one pierced primer since. It must be universal as the Barnard P actions come with small diameter firing pins regardless of which caliber the intended use is.

 

[dstoenner]

I can say that Gre-Tan did a fantastic job on 2 of my bolts. Now the primers look like the way you would expect a primer to look when hit with a well controlled firing pin. My last bolt will go the Greg after my last F-Class match of the year.

I have read through this thread and not seen where anybody recommended trying CCI-450's. My own evidence of this being a solution came this winter. I have been shooting 6BR for the last 5 years and have used BR4's all of this time. I am changing my F-Class rifle from 260 Remington to 6x47 Lapua. This last winter I took off my 260 barrel and put on my new 6x47 so that I could break in the barrel, fire form 300 cases and get an idea on what loads to start out this winter. Well I loaded up a bunch of cases to fire form and do the break-in. I started with a middle of the road load and found that I was piercing about 30% of my cases. So I brought everything home, pulled the bullets and deprimed the cases. I had finally found some 450's. resized the cases, reloaded with the same load except used 450's. Never blown a primer since. Never had an issue with my 6BR but before I got the firing pin bushed, they showed craters just not big craters. I guess I have been skirting on this with out knowing it till I tried the 6x47's.

Just an idea because 6 Creedmoor is even more powder for a BR4 to light.

David

 

[Laurie]

when I went to Lapua SR Palma brass in my Winchester Palma gun.

Ha! So, it's not just my FN. (The FN SPR uses a selected Winchester 70 pre-64 type action, actually one made for the WSMs but with a 0.473" face bolt for 308 case-heads, or at least did when mine was manufactured but New Haven was still just operating then.) So the Model 70 bolt generically has 'an issue' here - a shame as it's a very fine action.

 

[Uncle Ed]

I can say that Gre-Tan did a fantastic job on 2 of my bolts. Now the primers look like the way you would expect a primer to look when hit with a well controlled firing pin. My last bolt will go the Greg after my last F-Class match of the year.

I have read through this thread and not seen where anybody recommended trying CCI-450's. My own evidence of this being a solution came this winter. I have been shooting 6BR for the last 5 years and have used BR4's all of this time. I am changing my F-Class rifle from 260 Remington to 6x47 Lapua. This last winter I took off my 260 barrel and put on my new 6x47 so that I could break in the barrel, fire form 300 cases and get an idea on what loads to start out this winter. Well I loaded up a bunch of cases to fire form and do the break-in. I started with a middle of the road load and found that I was piercing about 30% of my cases. So I brought everything home, pulled the bullets and deprimed the cases. I had finally found some 450's. resized the cases, reloaded with the same load except used 450's. Never blown a primer since. Never had an issue with my 6BR but before I got the firing pin bushed, they showed craters just not big craters. I guess I have been skirting on this with out knowing it till I tried the 6x47's.

Just an idea because 6 Creedmoor is even more powder for a BR4 to light.

David

What brand type of primer were you using before you switched to CCI-450 primers.

 

[KC MO]

I had a piercing and failure to fire w new SP Lapua Brass. I used a primer pocket uniform tool on the rest of the lot, problem gone. I found the pockets so tight I couldn’t get uniform seating QUOTE="fatelvis, post: 37314258, member: 1275311"]After shooting F-class all year with my RPR 6 Creed, using Hornady and Lapua brass (reformed 308) with large primers (using Fed 210m) and always sticking to the same 40grn charge of RL16, I was excited to buy the newly offered Lapua brass in 6 Creed. I had no pressure problems, or pierced primers UNTIL using this new brass. At first, I used 205M Primers and got 5 piercings out of 34. After research, I saw that Federal’s SR primers were a bit thinner than others, so I instead used CCI BR4 primers, with the same powder charge. I had one piercing out of 33 yesterday. Can anyone explain what is happening to cause the piercings? I pulled apart my bolt and cleaned and inspected my firing pin. The bolt face and pin are unhurt. Thanks for your help guys![/QUOTE]

 

[dstoenner]

What brand type of primer were you using before you switched to CCI-450 primers.

First I was using cci400 then tried br4. Nothing worked till I went to 450s. When I get this bolt bushed I am sure that with 450s I can go much higher in pressure without piercing a primer. Later this winter I will find out.

David