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Long Range Hunting & Shooting
270 Allen Mag
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<blockquote data-quote="royinidaho" data-source="post: 152266" data-attributes="member: 2011"><p>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.</p><p></p><p>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.</p><p></p><p>This puts things about 20 thou off the lands.</p><p></p><p>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.</p></blockquote><p></p>
[QUOTE="royinidaho, post: 152266, member: 2011"] 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. [/QUOTE]
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