Meausurement needed: 300PRC with a 215 Berger

[OmegaRed]

All, I need to get the loaded neck diameter of some 300 PRC brass seated with a 215 Berger.

I NEED ADG measurements, but Lapua and Hornady would be helpful too. Thanks in advance!

 

[wasskeet]

FWIW, I just measured new Gunwerks loaded with 215 Berger at .335/.336". Same loaded in Hornady reload with 4 times on brass.

 

[whatnext]

ADG 30 Sherman Mag Which is 300 PRC brass with Sherman head stamp and 215 Berger = .335"

 

[OmegaRed]

That is insane to me. I'm at .3400-.3415 with two different lots of ADG and two different lots of 215's.

Chamber spec and fired rounds are at .3420. I just got some Lapua that measured .3380. Are you guys neck turning this brass or did I get an extremely thick necked lot?

 

[wasskeet]

As for mine, the Gunwerks is brand new ammo and the Hornady are reloads on the 4th loading. Sounds like ADG gave you too much brass LOL - you shouldn't need to do any neck turning to easily work in SAMMI form.
I'll measure some fired and new/raw ADG this evening to see what it is.

 

[wasskeet]

Okay, here are two more dimensions for you:

Once-fired, empty GW brass .340"
New ADG, unsized .333"

Both measured neck wall thickness is approx. .015"

 

[nwmnbowhunter]

ADG - 0.3365
LAPUA - 0.3385

 

[OmegaRed]

Shot a powder rough in on lunch. Finally hit a turning point now that I have adequate neck clearance.

 

[Mcranch]

ADG - 0.3365
LAPUA - 0.3385

Same on ADG .30 nosler. .336/.3365, with .215 Berger .338/.3385