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270 Dakota

 
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  #1  
Old 11-10-2006, 02:25 PM
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270 Dakota

Anybody know anything about this round? 270 Dakota It seems like it would slightly surpass a 270 Weatherby without a belt. How does this compare to the 270AM and 277AM? I know the 270AM is a 7mm RUM necked down but what is a 270AM?
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Old 11-10-2006, 03:07 PM
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Re: 270 Dakota

I shoot a 7mm Dakota in a center-grip XP-100 specialty handgun. It is basically a ballistic twin to the 7 STW.
The Dakota is a smaller capacity than Kirby's wildcats. I do use the 200 grain WIldcat bullet with 76.0 grains of Retumbo moving at 2706 fps from my XP (Smidget under a 18" barrel).
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Old 11-10-2006, 05:26 PM
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Re: 270 Dakota

Like was mentioned, a 270 AM is a 7RUM necked down. A 277 AM is a 338LM improved and necked down to .277. I think Kirby has his own version of the 270 Dakota improved to his AMish dimensions called a 270 AXM (Allen Xpress Mag) iirc.

That is the one like the 270 Dakota, and it has peaked my interest too; however, price and consitency of the brass has slowed me from looking into that round. Lapua was rumored to be taking over manufacture of the Dakota brass. If they do, it will still be expensive, but more likely worth the added cost to get such quality brass. On another note, it would allow you to push the charges a little higher and maintain the integrity of the brass if Lapua made it.
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Old 11-10-2006, 06:23 PM
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Re: 270 Dakota

What about shortening 300 rum brass to make Dakota brass? I have been thinking of building a 300 Dakota out of a barrel chambered in 300win mag that has a chamber problem and I figure the Dakota would be the way to go since I would not lose any barrel length like I would if I rechamber in 300 win mag. I just don't like the price of the dakota brass or the possiblity of losing a supplier.
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Old 11-14-2006, 09:19 AM
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Re: 270 Dakota

According to the Nosler guide the RUM case has a .534 cas head while the Dakota has a .545. The level of performance I am looking for is to launch a 150-160gr bullet around 3100fps. I know the 270 Weatherby will do this. I assume a 270-300 Win Mag would do this but I don't really want a belted magnum. JD338 says he gets around this level of performance from his 280 Ackely so I may just be able to get the same from a 270 Ackley. I really want a walking rifle with abround a 24" barrel. I assume that to get the performance out of the big Allen Mags you need a pretty substantial rifle with a long barrel. That's not what I am looking for at this time. I'm looking for more of a 500-600 yard gun for up to the occasional Elk but mostly hogs and deer.
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Old 11-14-2006, 10:27 AM
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Re: 270 Dakota

You might look at the 270WSM. The Nosler book shows 130gr loads to 3307fps, 140gr to 3186, 150gr to 3007 and 160gr to 2975 from a 24" barrel. Not quite the speed you're looking for, but pretty close for a standard cartridge.
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Old 11-14-2006, 03:51 PM
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Re: 270 Dakota

I have a long action that I am planning on rebarreling. I just don't like short action rounds in a long action. My brother has a .308 built on a long action and there seems to be so much extra room in the magazine. Probably just an aesthetic thing. I've been emailing Kirby but he is taking off to hunt for a while. His Xpress might be in the right range. I don't know if the dimensions of the Dakota case would be an issue in a magazine designed for a standard '06 size case. If I can get 3100fps with a 155gr out of 24" barrel and a 270 Ackley I may just go that route. It seems like JD338 is getting that out of his 280AI.
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