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#7122343 - 03/25/18 11:16 AM Primer size
scottfromdallas Offline
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Registered: 06/23/15
Posts: 774
Loc: TX

What are the advantages of using 308 small primer brass? I've heard theoretically less SD. Is there a burn rate where small works better? If you do go small, is it better to use small magnum to ensure proper ignition?
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#7122350 - 03/25/18 11:23 AM Re: Primer size [Re: scottfromdallas]
scottfromdallas Offline
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Registered: 06/23/15
Posts: 774
Loc: TX
Just realized this probably belongs in reloading section.
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#7122386 - 03/25/18 12:30 PM Re: Primer size [Re: scottfromdallas]
RiverRider Offline
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Registered: 11/11/07
Posts: 7858
Loc: Wise Co.
I suspect the main advantage of small primer pockets is strength of the case head and longevity of brass. If ignition is sufficient...who knows. If it works for the Creedmoor, I would imagine it would work fine for the .308 W.
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#7122404 - 03/25/18 12:49 PM Re: Primer size [Re: RiverRider]
FiremanJG Offline
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Originally Posted By: RiverRider
I suspect the main advantage of small primer pockets is strength of the case head and longevity of brass. If ignition is sufficient...who knows. If it works for the Creedmoor, I would imagine it would work fine for the .308 W.


+1
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#7122653 - 03/25/18 05:37 PM Re: Primer size [Re: scottfromdallas]
scottfromdallas Offline
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Registered: 06/23/15
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Loc: TX
Thanks brothers. I was looking at Alpha brass and all they had in stock was small primer which I've never tried. I may buy some and see how it does.
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#7122654 - 03/25/18 05:38 PM Re: Primer size [Re: scottfromdallas]
FiremanJG Offline
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You will need a small primer firing pin, in the bolt.
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#7122727 - 03/25/18 06:56 PM Re: Primer size [Re: scottfromdallas]
Cleric Offline
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Registered: 03/11/12
Posts: 3167
http://alphamunitions.com/kaubers-corner-large-vs-small-rifle-primers/


Donít think itís enough data to be conclusive but interesting

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#7122840 - 03/25/18 08:19 PM Re: Primer size [Re: scottfromdallas]
scottfromdallas Offline
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Registered: 06/23/15
Posts: 774
Loc: TX
Interesting. Thanks. If I switch my firing pin to a small, would it still work OK on large rifle primers?
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#7122851 - 03/25/18 08:26 PM Re: Primer size [Re: scottfromdallas]
DStroud Offline
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Registered: 11/02/11
Posts: 1711
Loc: Waco
I would try your existing firing first of course. My 22 Creedmoor works fine with a standard firing pin on both LR and SR but I use tough primers.
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#7122866 - 03/25/18 08:33 PM Re: Primer size [Re: scottfromdallas]
scottfromdallas Offline
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Registered: 06/23/15
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Loc: TX
Sounds good. I mostly have CCI 41 so I bet they would be fine.
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#7123098 - 03/26/18 07:44 AM Re: Primer size [Re: scottfromdallas]
Buzzsaw Offline
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Registered: 06/29/11
Posts: 12243
Loc: Frisco, Texas
Scott look at Copper Creek shooting they may have some regular primer in stock.

Alpha has really taken off and cant keep up with demand. Yes, I bought 100 6.5 Creedmoor and it is really nice.

I don't know if its any nicer than Norma or lapua. I know I'm not good enough to tell the difference.
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#7123104 - 03/26/18 07:48 AM Re: Primer size [Re: scottfromdallas]
dee Offline
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Registered: 04/10/10
Posts: 5264
Loc: Red River way
Used to be an article by the amu that showed smaller sd but it's long gone. Another article by German Salazar showing no difference when testing flash pattern from ppc flash hole vs normal size.

Most seem to think that in extreme low temperatures the small rifle/ppc flash hole like lapua uses causes ignition problems.
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#7123107 - 03/26/18 07:50 AM Re: Primer size [Re: scottfromdallas]
dee Offline
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Registered: 04/10/10
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Loc: Red River way
I'll add that I've ran lapua palma brass on my 7mm-08ai for a good while with zero ignition problems in all weather.
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#7123186 - 03/26/18 09:06 AM Re: Primer size [Re: scottfromdallas]
RiverRider Offline
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Registered: 11/11/07
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Loc: Wise Co.
What primer have you used. Dee?
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#7123194 - 03/26/18 09:14 AM Re: Primer size [Re: scottfromdallas]
dee Offline
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Registered: 04/10/10
Posts: 5264
Loc: Red River way
Cci standard and match along with federal gmm.
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