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Ultra Long Range Caliber?

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Unread 01-23-2010, 10:42 PM
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Join Date: Nov 2007
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Ultra Long Range Caliber?

I just bought a BAT 1.55 MB action with a magnum bolt face and a cheytac bolt face. What should I build for extreme long range shooting with the best wind advantage? I am thinking something like the 338 snipetac, 375 cheytac, etc. Might could trade the magnum bolt for Lapua 338 bolt. I would like to stick with the 338 bullets since they are becoming more and more available. Seems like through all my reading the 375 just gives you more thump but not more wind advantage. Velocity of the 338 seems to trump the 375.

What would you build and why? It will be built in a McMillan A5 with painkiller muzzlebrake and jewel 2oz trigger. This will be a single shot.

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Unread 01-23-2010, 10:47 PM
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Re: Ultra Long Range Caliber?

Kirby's Allen Mag, is about the top end of a 338 cartridge. It will push a 300grn SMK to 3400+fps. That will get well out to a mile plus for anything you would like to ring or kill.

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Unread 01-24-2010, 02:36 PM
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Re: Ultra Long Range Caliber?

In order to make a recommendation on an "Ultra Long Range Caliber, we really need to know what you consider ultra long range.

The .338 Lapua will certainly take care of the itch at long range.

Using the .408 case will give you a leg up on the Lapua.

Your analysis when comparing the .338-.408 to the .375-.408 is right on. Yes, the .375 will offer more energy as you are carrying a larger, heavier bullet, but the current production LR bullet is fair at best. My experience in shooting both at extreme ranges, is that the .375 and the .338 are ballistic twins out to lets say 1800-2000 yards.
That being said, it you want to step up past the Lapua, the .338-.408 is the logical choice.

Soon there will be a few more LR .338 bullets on the market, which makes this choice that much more desirable.

I've shot a few tiny groups with the .338-.408 and production bullets at one mile. All of my .338's on the .408 case are improved.
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Unread 01-24-2010, 03:14 PM
B23 B23 is offline
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Re: Ultra Long Range Caliber?

You're certainly starting out well. I don't think you can do much, if any, better than a BAT receiver. They are as good as you can get IMO.

If a person was looking to step up to the big dog 408 based 338's Kirby's 338AM and his one stop shopping would be tough to overlook.
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Unread 01-24-2010, 03:42 PM
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Join Date: Feb 2009
Posts: 3,548
Re: Ultra Long Range Caliber?

+1 with B23 on the BAT action and 338AM. I'm going with the BAT Model
M155R, single shot, right bolt, dual port-left feed, right eject, spiral
fluted bolt.

Last edited by Chas1; 01-25-2010 at 05:50 PM. Reason: no email notification
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Unread 01-24-2010, 05:03 PM
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Location: Blackfoot, Idaho
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Re: Ultra Long Range Caliber?

Ultra long range means, to me, beyond 1500 pushing 3000 yds. I suppose that this would be at rocks and stuff.

I decided to go with the 375 Allen Mag on the large Bat action. It should be along, shortly. (I hope, I hope, I hope) Its my 67th birthday gift from me to me.

With current major factory bullet offerings (Sierra) as stated above, the 300 SMK and 350 SMKs are twins from the 338 and 375 cals.

However, Just a bit more development on a heavier 375 is what made the decision easy for me. Plus, Paul @ Wildcat bullets has a bit of twinkle in his eye about a 375 offering. Paul is really good to work with and will soon become a bullet maker to recon with.
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Unread 01-24-2010, 05:25 PM
B23 B23 is offline
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Re: Ultra Long Range Caliber?

This is a bit of a moot point for me as I don't have a 375 nor do I have one in the works but for those that do has anyone tried any Rocky Mountain Bullets? They have some great looking BC's.

I have a 338LM AI on a BAT HRPIC that is nearing completion that's keeping me up at nights with thoughts of it's completion. Mine is getting a 1-10 hung on it so even when the RM Bullets do become available I won't have enough twist to use them. :(
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