.338-08 pressures compared to .308

Coyote · 03-18-2007, 03:34 PM

The more I read about the .338-08 the more I want to build up a nice carbine chambered for it. I suppose since it is a wildcat I'm going to have to handload anyway but I'd like to know how drastically the wider case mouth effects chamber pressure compared to the .308.

Much appreciated.

BigEd63 · 03-18-2007, 04:47 PM

Whatever happened with the .338-Federal round?

I thought it was about the same thing??

Coyote · 03-18-2007, 07:25 PM

It is but as I understand it almost nothing is chambered for it. Besides, I really want to build something up for it, I have something specific in mind.

BIGBORE · 03-18-2007, 09:48 PM

Quote:

Originally Posted by Coyote

The more I read about the .338-08 the more I want to build up a nice carbine chambered for it. I suppose since it is a wildcat I'm going to have to handload anyway but I'd like to know how drastically the wider case mouth effects chamber pressure compared to the .308.

Much appreciated.

Assuming optimal powders being used in both cases, you should be able to get 10% more muzzle energy in the 338/08 (338 Fed) at the same pressure level. However, since you can use much heavier bullets with the 338/08 (up to 250gr), you can get much more power. It should make you an excellent carbine for all non-dangerous North American big game.

Best regards,
BIGBORE

Aslan · 03-25-2007, 12:35 AM

I've been talking about building one of these for about 10 years...ever sincve a friend built a 338-06.

I figured a 358 necked down to .338 would be a nice bear / elk gun. short action, be easy handling and would pack a good wallop.

brass hammer · 03-26-2007, 12:05 AM

'excuse-me' ,,,gang! although, minus the speed, the 45-70 'kilt' ALL NON-DANGEROUS/dangerous ,,,,VARMINTS!!!.

[you 'want' to neck-up?,,,,HA!]

neolithic hunter · 03-26-2007, 12:53 PM

no brass if he uses 358 win brass , its neck down. if he is uses 308 win brass its neck up. or have i been incorrectly necking down 378 weatherby brass to 30-378, meaning i need to neck it up to 30 cal. i'm confused now brass.

03-18-2007, 03:34 PM	#1
Coyote Joined: Nov 2004 Posts: 1,903	.338-08 pressures compared to .308 The more I read about the .338-08 the more I want to build up a nice carbine chambered for it. I suppose since it is a wildcat I'm going to have to handload anyway but I'd like to know how drastically the wider case mouth effects chamber pressure compared to the .308. Much appreciated.

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03-18-2007, 04:47 PM	#2
BigEd63 Registered User Joined: Dec 2004 From: Arkansas Posts: 4,130	Whatever happened with the .338-Federal round? I thought it was about the same thing??

03-18-2007, 07:25 PM	#3
Coyote Joined: Nov 2004 Posts: 1,903	It is but as I understand it almost nothing is chambered for it. Besides, I really want to build something up for it, I have something specific in mind.

03-25-2007, 12:35 AM	#5
Aslan Registered User Joined: Oct 2003 From: 127.0.0.1 Posts: 4,648	I've been talking about building one of these for about 10 years...ever sincve a friend built a 338-06. I figured a 358 necked down to .338 would be a nice bear / elk gun. short action, be easy handling and would pack a good wallop.

03-26-2007, 12:05 AM	#6
brass hammer Joined: Jun 2004 Posts: 3,467	'excuse-me' ,,,gang! although, minus the speed, the 45-70 'kilt' ALL NON-DANGEROUS/dangerous ,,,,VARMINTS!!!. [you 'want' to neck-up?,,,,HA!]

03-26-2007, 12:53 PM	#7
neolithic hunter Registered User Joined: Feb 2005 From: on the back porch Posts: 1,621	no brass if he uses 358 win brass , its neck down. if he is uses 308 win brass its neck up. or have i been incorrectly necking down 378 weatherby brass to 30-378, meaning i need to neck it up to 30 cal. i'm confused now brass.