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Best long range cartridge that fits in a Mark V

 
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  #1  
Old 01-13-2009, 04:36 PM
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Best long range cartridge that fits in a Mark V

So I bought a Mark V rifle from a member on here, to be used as a donor action for a long range rifle project. I originally wanted a 338 Lapua or Lapua improved, but I'm open to other suggestions. Are Wildcat bullets ever going to be available again? Or any other smaller bore high-BC bullets?

The gun will be a general long range gong-banger, also used for deer and smaller game. It will also be with me for a while, as a present for getting a 31 on my ACT. (which I have not achieved yet...but I have 2 years to complete the task )
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Old 01-13-2009, 04:46 PM
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Re: Best long range cartridge that fits in a Mark V

Seems to me the choices are .338 Lapua, 300 Win, or a 7mm. The question is, how far do you want to effectivly kill game? Any of the above will do it to 1200, but if it were me I would go with the bullet that will retain more energy and has the higher BC. If you are only going to have one rifle for a while, I would go with the 338 Lapua. You can still get awesome brass for it and you already have the action that will handle it gracefully. You could always build a smaller cal later. But you won't need it..

Jeff

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Old 01-13-2009, 05:07 PM
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Re: Best long range cartridge that fits in a Mark V

I figure with practice I'd like to shoot game to 1200. I'm already getting pretty good at hitting the little gong up at Paris cold bore.

I want the round to be supersonic as far as possible for banging steel. Here at Missouri altitude the new 300 grain Bergers at 2900 fps go subsonic at about 2100 yards, which is plenty far for me. A 7mm-338 Lapua shooting 200 grain Wildcats could be as effective on medium to smaller game, but what would bore life be like? .9 BC at 3300-3400 fps would be a death ray...for how long? I'm not aware of any affordable bullets in 30 caliber with a .8+ BC, other than the HAT's, but I cannot afford to shoot them.
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Old 01-14-2009, 07:45 AM
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Re: Best long range cartridge that fits in a Mark V

If it is a magnum bolt face then I would recomend the 338RUM.

If it's the big bolt face (.585 ) then go with the 338/378 .

If you want to use the .540 bolt face action then you can have it
opened up very easy to the .585 bolt face and just replace the
extractor with the proper one from Weatherby for about $30.oo.

J E CUSTOM
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Old 01-14-2009, 05:43 PM
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Re: Best long range cartridge that fits in a Mark V

Tyler, 338, the only way to fly. if you don't go with the 378 case, you'll probably regret it.

with 2 more bullet makers coming on line with great 338 bullets, it's just a no-brainer.
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  #6  
Old 01-14-2009, 06:07 PM
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Re: Best long range cartridge that fits in a Mark V

Agree with the last two. This is a no brainer with the 378 case or the 416 Rigby improved necked to 338. Why would you want to go backwards with the Lapua. If you have an action that will hold the big boys then make it shine.
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Old 01-14-2009, 06:54 PM
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Re: Best long range cartridge that fits in a Mark V

Quote:
Originally Posted by WyomingShooter View Post
Agree with the last two. This is a no brainer with the 378 case or the 416 Rigby improved necked to 338. Why would you want to go backwards with the Lapua. If you have an action that will hold the big boys then make it shine.
Interesting discussion but there is one caveat that is being missed here. The question basically is what is the best option for a weatherby mark V rifle. As you jump into serious rifles and want a 416 rigby improved necked to 338, you will probably need a new barrel. Not sure of the rifling specifics of the cartridge but this is undoubtedly a very serious issue for a weatherby. If it were me, I would go with a 338-378 and work up some serious loads for the rifle. People have cursed the rifle but if it broken in properly, it is accurate enough. Or you can use a 30-378 which a distant relative of mine (Earl Chronister) shot a 4 inch 10 shot group at 1022 yards (Williamsport, Pa) which I am sure you would argue is accurate enough. I have a custom made 30-378 and it is as accurate as you want at 500-1000 yards. Course shooting at 1000 yards is very difficult and requires years of practice. But for long distance, I would go for a 338 which BTW killed a Prairie dog at 1.78 miles (no typo).

bob chronister
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