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What ACTION for a 7mm-338 LAPUA Imp. cartridge?

 
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  #36  
Old 03-11-2005, 12:10 PM
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Re: What ACTION for a 7mm-338 LAPUA Imp. cartridge?

I am aware of this cartridge. He was talking about the 7mm-.338 Lapua IMPROVED. It is quite a bit bigger.
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  #37  
Old 03-11-2005, 12:28 PM
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Re: What ACTION for a 7mm-338 LAPUA Imp. cartridge?

I must be looking in the wrong places, then. Ammoguide shows the .338 Lapua Improved case as still something like 2.725" long and .585" at the base, narrowing to .570". The Firebird case, as I recall, is over 2.9" long, about .6" at the base, though more tapered. But still, the height to the top of the shoulder is still about .1" more on the Firebird than the .338 Lapua Improved. Are you sure the .338 LI has more capacity than the Firebird (or the ballistically similar .30-.378 Weatherby)?
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  #38  
Old 03-11-2005, 12:32 PM
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Re: What ACTION for a 7mm-338 LAPUA Imp. cartridge?

Not positive. I was saying that the improved version of the .338 Lap is quite a bit bigger than the standard version as far as case capacity goes.
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  #39  
Old 03-11-2005, 03:04 PM
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Re: What ACTION for a 7mm-338 LAPUA Imp. cartridge?

Of course, now I'm wondering about the performance of a .22-.338 Lapua Improved...hmmm, maybe a little too overbore? [img]/ubbthreads/images/graemlins/crazy.gif[/img]
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Old 03-11-2005, 04:35 PM
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Re: What ACTION for a 7mm-338 LAPUA Imp. cartridge?

The 338 lapua, and the big Lazzeroni rounds have roughly the same size case head.

The Lapua is a bit shorter but most of that is in the longer neck of the Firebird round but I believe it is still 2.800" or less in length, do not have a case but I know they are significantly shorter then the 300 RUM case.

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Kirby Allen(50)
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  #41  
Old 03-11-2005, 04:38 PM
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Re: What ACTION for a 7mm-338 LAPUA Imp. cartridge?

GoodGrouper,

The eternal optomist!!!

I agree, many a rounds have looked impressive on paper only to be a flop when bullets actually fly.

I feel Richard and I have done some good research on this and can make it work to at least come very close to our goals.

When I started the 257 Allen Mag project, many though I was insane to cram a 100 gr capacity case in a 1/4 bore round(they may have been onto something [img]/ubbthreads/images/graemlins/blush.gif[/img]!!)

But with properly set up loads with heavy bullets, this round is really a pussy cat. The 7mm Allen Mag has roughly the same porportions as the 257 Allen Mag as far as case capacity to bore volume so we will see what happens.

Like you said, until bullets are landing close to each other at extreme range, its just another crazy idea!!!

Good Shooting!!

Kirby Allen(50)
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