Lapua .308 small primer case info

[Graham]

Lapua is set to announce at the SHOT show a version of its .308 Winchester cartridge case that has a small BR-style primer pocket.

The flash-hole size of the pre-production .308 Lapua Palma brass is 1.5mm (.059).

This reminds me of old Universal Remington Benchrest (UBR) .308 brass, which I would shoot if I could find any.

When I tried it, using a small rifle primer raised pressures instead of lowering them.

Does anyone have info on:

1) The actual primer pocket size that Lapua will be using in the production brass;

2) Planned case wall thickness at the neck (will it be thinner brass like the UBR was?);

3) How using a small rifle primer will affect the pressures obtainable with a standard diameter firing pin hole?

 

[Graham]

Re: Lapua .308 small primer case info

Bump.

 

[J.Boney]

Re: Lapua .308 small primer case info

RG, did you check out the below link on Accurate Shooter? It's about 2/3 down the page.

http://accurateshooter.com/bulletin.html

Jon

 

[Graham]

Re: Lapua .308 small primer case info

Yeah, just saw that.

I'm pushing 180 VLD LBT's with a .580 BC at 2730fps in a .308. That's putting the cartridge on the edge of its performance envelope. But at the 1020 yard stage I was at 9.8 Mils elevation and I was only holding 1 Mil of wind. Not bad for a .308 with a 12-twist in 45 degree weather.

I wanted to see if anyone had some of the new brass and had taken measurements. I really liked the UBR stuff, but I know if I try to switch to the Lapua I'll have to work up new load data, with less power, than in my present load.

 

[user]

Re: Lapua .308 small primer case info

good questions........i'm going to try'em though

 

[Mag 300]

Re: Lapua .308 small primer case info

Why,
what is the upside of the small primers?
Bill

 

[81STFACP]

Re: Lapua .308 small primer case info

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Graham</div><div class="ubbcode-body"> This reminds me of old Universal Remington Benchrest (UBR) .308 brass, which I would shoot if I could find any. </div></div>

What is the going street price on these if you find them? I've used them exclusively for mid range on my M1As to launch the 185 Bergers.

 

[memilanuk]

Re: Lapua .308 small primer case info

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Bill Stoffels</div><div class="ubbcode-body">
what is the upside of the small primers?
</div></div>

Did you not read the linked article?