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270 Allen Mag

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  #8  
Unread 04-29-2007, 04:35 PM
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Re: 270 Allen Mag

What kind of velocities do you get with 150's?--JM.
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  •   #9  
    Unread 04-29-2007, 07:49 PM
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    Join Date: Jan 2004
    Location: Blackfoot, Idaho
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    Re: 270 Allen Mag

    The ridge left on the neck, next to the shoulder (a little less than the thickness of a dime) is to hold the case firmly to length (head space) and prevent stretching of the body.

    COL of both the 169 and 195 is 3.045" base to ogive using a Sinclair thinger that looks like a hex nut with various caliber holes drilled in it. Which ends up being 3.62 base to tip.

    This puts things about 20 thou off the lands.

    If I remember correctly Kirby was having problems with reamers at the time mine was made and my throat is a bit tight. Not the neck but, the throat. It seems to make no difference to anything. I also think its throated for the 169. It meets my specks for accuracy and velocity with both bullets. Well, actually it out shoots me.
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