2F Test

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Kurt
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Re: 2F Test

Post by Kurt »

Ian.

I seldom pull the Stevens block so I can't say how long this happened. When I first saw the block with the cuts was when I got the rifle back from CPA getting a new barrel fit to the action and I thought they put the wrong block back in so I called them and Gale sent me a new one but I ended up paying for it after finding one Shiloh block the same way and the new Stevens block had two cuts, so it was my fault not theirs. I stopped putting paper under pistol primers and the problem quit happening. I also quit using pistol primers.

Glenn.
The primers getting pierced is not the problem and they are a snug fit seating them. The problem is the pistol primers have a softer cup than the rifle primers. I was cutting printer paper with the primer seating the pistol primers this builds up pressure for the primer flash blowing back past the primer pocket wall and the primer cup.
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SSShooter
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Re: 2F Test

Post by SSShooter »

Kurt wrote: Mon Jul 20, 2020 6:07 amGlenn.
The primers getting pierced is not the problem and they are a snug fit seating them. The problem is the pistol primers have a softer cup than the rifle primers. I was cutting printer paper with the primer seating the pistol primers this builds up pressure for the primer flash blowing back past the primer pocket wall and the primer cup.
I've only tested LP primers in the past and am still doing so now. I've yet to see a difference on the target between LP & LR primers (the differences I see are between brands rather than LP or LR). I load with a 55w paper wad dropped into the bottom of the case before dropping the powder into same. Using that paper wad is still under test, as well. I will be paying close attention to the block face on my CPA over the 500rds I have loaded (250 w/LR & 250 2/LP). Thus far I've seen no indication on the cases that there is any gas leakage around the primers. But, that may be due to the fact that I've started this season with 500 new cases.
Glenn
ian45662
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Re: 2F Test

Post by ian45662 »

Last time I had mine out of the rifle it looked good. My highwall looked good still and it has fired a couple thousand pistol primers. I will have to keep an eye on it though. Kurt what brand of pistol primers were you using?
John Bly
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Re: 2F Test

Post by John Bly »

That's the same problem Mark Finney had, leaky primers with gas cutting of the breech block. Shiloh charged him for a new block but returned the old one. He showed several of us in MI.
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Kurt
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Joined: Wed Oct 12, 2005 10:28 pm
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Re: 2F Test

Post by Kurt »

Glenn I'm with you on the difference between LP and LR primer use. I don't see any improvements using the LP primers.
I use Fed. GM 210 M now for everything and get along fine using them. The jury is still out putting a thin wad under the powder because I don't see any improvements doing that either except when I use 3F in some of my smaller calibers like the .40-65, there I see a decrease in the verticals using a thin paper wad.
The reason a dog has so many friends is because he wags his tail instead of his tongue.

"Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery"Winston Churchill
Kurt
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Re: 2F Test

Post by Kurt »

ian45662 wrote: Mon Jul 20, 2020 7:31 am Last time I had mine out of the rifle it looked good. My highwall looked good still and it has fired a couple thousand pistol primers. I will have to keep an eye on it though. Kurt what brand of pistol primers were you using?
Fed GM 150 match
The reason a dog has so many friends is because he wags his tail instead of his tongue.

"Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery"Winston Churchill
SSShooter
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Re: 2F Test

Post by SSShooter »

One problem with this current "let's hoard everything, again...... it was so much fun last time" mentality, we are pretty much stuck with whatever we can find for primers at the moment. Rem 9 1/2 & Win LR rather than CCI 200 I prefer and Fed Mag LP rather than the Rem 2 1/2 would rather have. But, does give one an 'opportunity' to test more primers. ;) Maybe I'll find a new "preferred" primer.
Glenn
Kurt
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Re: 2F Test

Post by Kurt »

Here is the Shiloh breach block. I caught this with one outing at the range range when cleaning the rifle.

IMG_3677.jpeg
The reason a dog has so many friends is because he wags his tail instead of his tongue.

"Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery"Winston Churchill
SSShooter
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Re: 2F Test

Post by SSShooter »

Ian's 2F tests seemed to have turned out well. His 32 at yesterday's 1st day of big-bore stands atop the field at the KY 3-day match.
Glenn
ian45662
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Re: 2F Test

Post by ian45662 »

I am liking it!!!
GrumpyBear
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Re: 2F Test

Post by GrumpyBear »

So which load did you end up going with Ian. Congratulations on winning the match by the way.
ian45662
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Re: 2F Test

Post by ian45662 »

81 grains seemed to shoot pretty good
mdeland
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Re: 2F Test

Post by mdeland »

It's not the pressure from the black powder ignition causing this it's the priming compound detonation being redirected to the rear from loose fit and probably the paper under neath.
mdeland
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Re: 2F Test

Post by mdeland »

I have an idea that if the hole in the bottom of primer pockets where chambered a bit , as the interiors often are when reaming the flash hole, that it might help mitigate this tendency to flash back primer detonation and eat up the breech block faces when using pistol primers. The notion at least deserves a trial I would think for you folks that like pistol primer use.
mdeland
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Re: 2F Test

Post by mdeland »

chamfered not chambered ! :roll:
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