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.243 Rock Chucker?

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  #1  
Unread 11-07-2008, 12:00 PM
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.243 Rock Chucker?

A buddy asked me about this round today and I honestly had never heard about it before. A quick search showed that it's a .257 Roberts necked down to .243. Anybody here shooting one? He is pretty sure that his 6mm AI is on it's last legs and is looking for a a new caliber. He wants a fast 6mm but not ridiculously overbore. Doens't care if it's no better than his 6mm AI he just wants to try something new. It's a coyote rifle so it never see's rapid fire and not many rounds a year so barrel life is not a big worry as long as he can get 900-1000 rounds of good accuracy out of it. Or if you have no experience with the .243 Rock Chucker what would you recoment for a 6mm coyote round. He would like to go wildcat cartridge but nothing too crazy.
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  •   #2  
    Unread 11-07-2008, 06:39 PM
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    Re: .243 Rock Chucker?

    If he wants speed and accuracy, I would go with a 6x284. With a 30" barrel, it will push the 87grn V-Max at 3700fps.
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      #3  
    Unread 11-11-2008, 07:13 PM
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    Re: .243 Rock Chucker?

    As I recall, that's just an old name for the wildcat that eventually became the 6mm Remington.

    Could be wrong though...
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    Unread 11-11-2008, 07:14 PM
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    Re: .243 Rock Chucker?

    BTW - the 6mm Rem does work great on coyotes!
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      #5  
    Unread 11-12-2008, 05:29 PM
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    Re: .243 Rock Chucker?

    Quote:
    Originally Posted by Guy M View Post
    As I recall, that's just an old name for the wildcat that eventually became the 6mm Remington.

    Could be wrong though...
    If you remember it wrong, we really need to meet as I remember it the same way.
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      #6  
    Unread 11-14-2008, 06:23 PM
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    Re: .243 Rock Chucker?

    To put it another way a 257 Roberts necked to 243 is a 6mm Remington. If you already have 6mm RemingtonAI dies it would be crazy to switch to something else, once the barrel is toast then fireform a couple hundred new cases and you are good to go with your new barrel.
    UB
    ps instead of switching cases try a fast twist barrel (1-8" or 1-9"twist for VLD type bullets)
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    Last edited by uncleB; 11-14-2008 at 06:36 PM.
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      #7  
    Unread 11-28-2008, 10:19 PM
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    Re: .243 Rock Chucker?

    Go with the 6x284, use 6.5x284 Lapua brass. With a 26-inch barrel you can get 3600 FPS with the 87-grain V-Max. It will kill prairie dogs past 1,000 yards. This combination will splatter anything you shoot with it beyond description. I also like to shoot the 105 A-Max at 3200 FPS. This is a reduced load, 200 FPS off of max, but it seems to defy gravity and shoots flat as a string. It opens up very well too. Go with a 9-twist if you want to stablize the 105 V-Max. 12-twist or faster will stabilize the 87 V-Max.
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