I just got a 6 dasher that I put together. Zermatt origin with proof pre fit 26" barrel. Brand new alpha brass srp. At 31.7 with varget I got a blown primer didn't come out but it had carbon ring around it and a hole. I started with shooters world precision and had it do the same thing at 31.5 with heavy bolt lift so I stopped cause I was just looking for pressure with the powder and just switched to varget. I did 5 rounds at 31.7 and didn't have a problem with the other 4 rounds but the 1 round had the problem. Shot 5 at 32.2 and they didn't have any problem or heavy bolt lift. I'm using winchester #41 cause it's what I have and I didn't think it would be a problem but is that the problem? Do I need to switch primers i do have some cci450. I also noticed my bolt now has 2 little dimples on the face is it trashed now to?
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Primer blowout
- Thread starter Bowtechassassin
- Start date
Looking at the pictures and before I read your post I was guessing it was probably Winchester primers.
In the last couple years, I've seen this a lot with Winchester primers. So, yes . . . I'd suggest you switch to something like the CCI450's for your Alpha brass.With Alpha brass there's an issue with their a little larger than the usual SRP flash holes, as that tends to produce this result when using thin skinned SRP's. . . like CCI400's. I got the same result with my Alpha brass using CCI400's; switched to CCI 450's and had no further issue. Also, did real well using Remington 7.5's.
There have been many reports of some bad Win 41’s out there the last year or so. Betting you have some.
I've got 2 bricks i was gonna use specifically for this gun but it sounds like i need to get rid of them entirely. What's the opinions about the bolt head?
Bolt face is fine.
Quit loading too hot on top of crap primers. The choice to then increase powder after blowing primers was a poor one. The bolt face should be fine.
Quit loading too hot on top of crap primers. The choice to then increase powder after blowing primers was a poor one. The bolt face should be fine.
The bolt face is not fine... it could be refaced in the lathe, and reset headspace.
The firing pin hole looks out of round.
So bush the firing pin hole, at the same time.
Primers are struck off center. So barrel, bolt, or reciver are not on the same centerline. Common in old production rifles.
I use Remington 7 1/2 primers in 6 Dasher Alpha brass exclusively, as primer pockets are tight with 450s.
The firing pin hole looks out of round.
So bush the firing pin hole, at the same time.
Primers are struck off center. So barrel, bolt, or reciver are not on the same centerline. Common in old production rifles.
I use Remington 7 1/2 primers in 6 Dasher Alpha brass exclusively, as primer pockets are tight with 450s.
It's an Origin action.
The cost to do all that machining would exceed the price of two new bolt heads.
