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Question about 240 Weatherby Caliber

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Unread 02-15-2007, 09:41 PM
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Join Date: Sep 2005
Posts: 748
Re: Question about 240 Weatherby Caliber

Hi you could do a 6mm284 on a short action with an extended mag box it will give you the same performance with greater flexibility and i believe it is a better designed case. The only reason for the longer mag box is to load the 107gr+ vld's out further to allow more space in the case for powder. I would look at a 9 twist and it should do up to 107gr projectiles without any hassle. you can also have your factory 243 barrel rechambered to 6mm284 depending on the neck diameter you may have to set it back 1/4" that is it. I believe it is a better conversian that hhe 6mm06 0r 240. Ask Kirby he has some info on them.

If you want a real fire breather you can open the boltface to magnum and run a 6mm Remington short action ultra mag. That will realy get the projectiles hunting out there and would also fit the mag box well and be able to push the 120gr Wildcats out at a great velocity but a slightly faster twist than 9 would be needed for the 120's mabe a 8.5 twist at those velocities.

Cheers Bill
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Unread 02-15-2007, 11:09 PM
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Join Date: Jan 2003
Location: centre,alabama
Posts: 948
Re: Question about 240 Weatherby Caliber

You can get similar performance with the .243 Ackley Improved with not much change, I wouldn't rule out a bit of free bore either most of my rifles have it and don't suffer in accuracy...Match grade barrels are hard to beat especially ones with a twist to match the bullet you intend to shoot and with enough length to utilize powder...
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