Is there an advantage?

[Paddyd]

I'm looking at buying some new 308W brass. Im seeing standard LR primer and SR primer cases. The SR are marked as match. Is there an advantage to the small primer vs large? Seems like ignition would suffer with the smaller primers.

 

[DHD]

I have and use both small and large primer Lapua. Just me, but I cannot say accuracy is different between them using the same load. The Palma is slower by a touch, but that is it.

I have had loose primer pockets on the standard Lapua 308 after many firings, but that Palma brass is not going to quit.

On my first 100 pieces of Palma, I had at least 5 firings as 308, then converted it to 6.5 Creedmoor (long before Lapua made SR Creedmoor brass). I have at least 10 firings on it converted before I moved away from the Creedmoor. My Creedmoor has an Obermeyer barrel I don't want to waste as it can't be replaced (call it silly or nostalgic). My hair isn't long enough for a man bun so I will need to retire and grow my hair out before I rebarrel it with a CRB in 6.5 Creedmoor....

 

[mikecr]

Small pockets could allow more meat in the webs.
Small primers do not ignite less than large.
So no downside to using small pockets.

 

[Aaron23]

Small pockets could allow more meat in the webs.
Small primers do not ignite less than large.
So no downside to using small pockets.

Their is less brisance with those smaller primers.

I shoot a lot of plastic pistol bullets (primer powered only - no powder at all) and aside of the fact that you can clearly see the difference in the sparks that come out the end of the barrels behind the plastic bullets (small pistol magnum primers compared to large pistol magnum primers of same brand) there is also noticeably more velocity with the larger primers.

Generally I use a piece of carpet scrap for a backstop and the velocity difference can be seen fairly easily by noting which primers cause the plastic bullet to seriously deform the backside of the carpet (large primers) and which do very little damage (small primers).

 

[CJ6]

Ball powders and SRPs don't work well in COLD temperatures +20 to -30. You'll get hangfires.
If you walk or stand hunt critters in the winter you'll understand.
Under "normal" conditions SRPs can lower SDs and ESs.
Just saying that SRPs have their limits.

 

[Straightshooter1]

Ball powders and SRPs don't work well in COLD temperatures +20 to -30. You'll get hangfires.
If you walk or stand hunt critters in the winter you'll understand.
Under "normal" conditions SRPs can lower SDs and ESs.
Just saying that SRPs have their limits.

Yes . . . this ^^^^^

 

[sgav8r]

I've personally had GREAT success...

...with Starline Match (SR) and standard Lapua (LP) brass in .308. Lots of sub half minute groups from both, and they seem to be lasting a gapped long time. I've got 4 loadings before needing to trim on both and they keep chugging along. I'm not loading anything super hot, but they've both worked equally well for me. I'm typically using CCI BR-4 SR primers and Federal 210/210M LP primers. Varget, N150, N140, AR Comp powders primarily.

 

[mikecr]

I don't know for sure, but it looks pretty easy to never use ball powders in the cold.

 

[swd]

FTR shooters use Lapua small primer brass because it allows higher pressure and lives longer.

 

[ELR LVR]

FTR shooters use Lapua small primer brass because it allows higher pressure and lives longer.

^^^ This
Can run hotter without enlarging the primer pockets with Small Primer Pockets
due to more thickness between the hole and the O.D.
Good for wildcats based off the .308