Can anyone give me a little insight on this caliber.I just bought one in a 700 Remington.Built by Unique Guns out of Texas.
What are you using for bullets and what shoots the best for you.And what kind of loads you have worked up. Thanks

http://www.lazzeroni.com

This is the Lazzeroni web-site....but....I would start low on the suggestion loads and be very careful as these loads are for the McMillan MCRT action that Lazzeroni uses and I wouldn't try and reach those velcoities using a Remington 700 action. If I were you I would read the article on the Lilja barrel web-site that talks about bolt-thrust before I reloaded even one round.

The only lazzeroni cartridge I saw in a remington was a 416 meteor.

I have no doubt the rifle will handle it just fine.

I would ask unique guns if they can help with loads too.

Suggest you read this...

http://www.riflebarrels.com/articles/custom_actions/378...ngton_700_action.htm

and do you think there is a reason why Lazeroni started out using Remington actions and then moved to something a bit stronger?


Here's the Lazzeroni loading data...
http://www.lazzeroni.com/ct_reload_warbird.htm


and I should probably add that I have 2 Lazzeroni rifles....a 7.82 Patriot and the first 9.53 HellCat he made so I do have some experience with loading for them.

I did read the article.

Only problem is he starts off saying the 700 barrel is the same size as the weatherby mark V . The Mark V has been handling those cartridges for how long now?

Also the picture they show with the bullet sticking so far out of the case is a bit misleading. The remington long action is H-H length.


Guess this is all moot anyway. We all know it will fit and it will shoot. It might need to keep the pressure a little lower than if it was in some monster action but each rifle is an individual anyways and should be loaded for as an individual.

Forget the fact that the big Weatherby is longer than the Warbird, it's the bolt-thrust that concerns me.

I do see what your saying DB. But is the Sako action in the 300 warbird is it that much stronger that you dont have to worry about Bolt thrust in it?And Savage is making the 300 Patroit dont you have to worry about that one to?

I believe the SAKO has three lugs, no? And they are building 338 Lapuas as well.
Not sure about Savage.
Maybe one of those things that from a machinist point of view, the tolerance isn't great enough for comfort, but on a case-by-case you may never see an action blow. It's like those old k98's chambering Rigby rounds.
Anyway,the round is silly-huge. You shouldn't need anything near 62k psi to get the goods out of it. What's Lazzeroni do, 64k? And as pressure goes down, of course thrust does reciprocally.
Think of it as a low-pressure RUM. :-)

closer to 67K than 64K

quote:

Only problem is he starts off saying the 700 barrel is the same size as the weatherby mark V . The Mark V has been handling those cartridges for how long now?

Well said.After all weatherby developed the 378 case for the mark V action.

quote:

Forget the fact that the big Weatherby is longer than the Warbird, it's the bolt-thrust that concerns me.

And with the weatherby mark V having nine very small lugs some of which do not even make contact,would it not also be a problem with the weatherby rifles?

The Remington action is chambered in 300 Ultra mag.Why would it not be up to the stress of the Warbird

The RUM is nom .550" at the base. The Warbird, waht? .570" I think. Bolt thrust increases exponentially with radius. People own and shoot M700's in 338LM (.592"?), so we can't say it's undoable. But it appears the margni is getting thin much past the old H&H case and high pressures.
Funny how Wby and Lzz are so amazing with their speeds, but then you see part of it is good ol' fashioned hot rodding.
I had a 30-06 that would get close to 3k with a 165g bullet. Wonder how that was. No magic.

A couple of differences between the Wby and Rem 700 might have some bearing.

While the barrel threads are the same the Wby has a much shorter barrel thread.

While some of the 9 lugs might not be bearing they would not be missing by much and probably engage with any set back. The lug arrangement of the Wby will have considerably more bearing area than the Rem 700.

Personally, I think the main issue with the Rem 700 will be how thin the metal on the bolt counterbore becomes.

HS Precision chamber the big Wbys and 338 Lapua but unlike the Rem 700 the bolt nose does extend out beyond the lugs. Thus the lugs form part of the counterbore metal whicj in turn will mean the other part of the counterbore will be more rigid.

Mike