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280 AI chamber length
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<blockquote data-quote="Maxxis31" data-source="post: 1071707" data-attributes="member: 61079"><p>I also have the old Ackley chamber in my 280AI. My oal is 2.700 (where bullet hits the lands) with Berger VLD 168's, I am seating to a COAL of 2.689 putting me .011 off. I would think it will be different depending on the bullet you are using.</p><p></p><p>I have been using Retumbo with good luck and it is almost impossible to get it too hot. I am shooting 63gr which is book max but shoot 64gr with no pressure signs or stiff bolt, I don't think it would be possible to get much more powder in the case as even 62gr is a compressed loads with the VLD. I am using BR2 primers and Norma brass, I have not trimmed my brass at all or even measured it after 3 firings???</p><p></p><p>I am using the SAAMI spec. dies and setting them .014 back so I don't bump the shoulder. The rifle has shoot extremely well through load development and Almost never shoots over MOA even while fireforming with cheap quick loads.</p><p></p><p>My rifle is a 700 action, blueprinted and has a 25" Walther barrel, I bought it off of here about a month ago and absolutely love it. </p><p></p><p>What rifle do you have, How heavy of bullets are you shooting? Have you tried jump shooting? Any load data? I had to jump shoot the last rifle I tried with VLD's and ended up settling on .090 off the lands.</p><p></p><p>I also talked to a couple guys who ended up shooting 140gr bullets out of their 280AI because they couldn't get heavier bullets to shoot??? Personally i believe you are not using the rifle to its potential using that light of a bullet and it will be passed up by several smaller calibers when shooting bullets under 150gr. If you have a decent lenth barrel with a 1:9 twist you should be stabilizing pretty much every bullet offered for the .284.</p><p></p><p>Also a little info about yourself is kind of the norm as a first time poster, there have been lots of people on here helping me out quite a bit thought P.M.'s when I was developing a load for my rifle. It is very possible that it is not the load but some under lying issue, loose mount, barrel not floated, rifle ratchet strapped to a 2x4, ect. A little more detail would be great. By nature most 280's Ackley or Standard shoot inherently well.</p><p></p><p>Welcome to the Forum</p></blockquote><p></p>
[QUOTE="Maxxis31, post: 1071707, member: 61079"] I also have the old Ackley chamber in my 280AI. My oal is 2.700 (where bullet hits the lands) with Berger VLD 168's, I am seating to a COAL of 2.689 putting me .011 off. I would think it will be different depending on the bullet you are using. I have been using Retumbo with good luck and it is almost impossible to get it too hot. I am shooting 63gr which is book max but shoot 64gr with no pressure signs or stiff bolt, I don't think it would be possible to get much more powder in the case as even 62gr is a compressed loads with the VLD. I am using BR2 primers and Norma brass, I have not trimmed my brass at all or even measured it after 3 firings??? I am using the SAAMI spec. dies and setting them .014 back so I don't bump the shoulder. The rifle has shoot extremely well through load development and Almost never shoots over MOA even while fireforming with cheap quick loads. My rifle is a 700 action, blueprinted and has a 25" Walther barrel, I bought it off of here about a month ago and absolutely love it. What rifle do you have, How heavy of bullets are you shooting? Have you tried jump shooting? Any load data? I had to jump shoot the last rifle I tried with VLD's and ended up settling on .090 off the lands. I also talked to a couple guys who ended up shooting 140gr bullets out of their 280AI because they couldn't get heavier bullets to shoot??? Personally i believe you are not using the rifle to its potential using that light of a bullet and it will be passed up by several smaller calibers when shooting bullets under 150gr. If you have a decent lenth barrel with a 1:9 twist you should be stabilizing pretty much every bullet offered for the .284. Also a little info about yourself is kind of the norm as a first time poster, there have been lots of people on here helping me out quite a bit thought P.M.'s when I was developing a load for my rifle. It is very possible that it is not the load but some under lying issue, loose mount, barrel not floated, rifle ratchet strapped to a 2x4, ect. A little more detail would be great. By nature most 280's Ackley or Standard shoot inherently well. Welcome to the Forum [/QUOTE]
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