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Rifles, Reloading, Optics, Equipment
Reloading
.270 AI vs .280 AI SAAMI vs .280 AI 40 degree information.
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<blockquote data-quote="Alibiiv" data-source="post: 1542888" data-attributes="member: 69192"><p>Yes and this is where the confusion starts with the mixed information on this caliber. My <u><em>humble</em></u> understanding of this caliber is that the original Ackley Improved cartridges all used the exact, same dimensions of the original parent case <u><em>with the exception of</em></u> straightening out the taper on the outside walls of the case, pushing the shoulder forward and changing the angle of the shoulder to 40 degrees. With that said the <em>original</em> .280 Remington case length is <strong>2.540</strong> thousandths long. Now the .280 Ackley Improved (SAAMI), (Nosler's version) measures <strong>2.525</strong> thousandths case length. Now we have a <strong>.015</strong> thousandths difference in the overall length of the case. I am afraid that if I do what you are suggesting in this post to fire form my cases for the <strong><u><em>.280AI wildca</em></u></strong>t from the .280AI SAAMI, that I will end up with cases that are .015 thousandths too short because Nosler chose to shorten the SAAMI version by .015 thousandths <u><em>for "whatever" reason</em></u>. Again in my humble understanding of the caliber, "if" I choose the .280AI 40` (wildcat), I can use regular .280 Remington brass or .270 Winchester brass (no trimming), open the necks to 30 caliber, set a false shoulder by backing a .280 Remington full length sizing die out .015 thousandths and fire form my cases in the .280 AI 40` chamber. Wow lots of stuff going on here!! PLEASE if I am incorrect here.......................let me know, otherwise I'll probably be making some big mistakes.</p></blockquote><p></p>
[QUOTE="Alibiiv, post: 1542888, member: 69192"] Yes and this is where the confusion starts with the mixed information on this caliber. My [U][I]humble[/I][/U] understanding of this caliber is that the original Ackley Improved cartridges all used the exact, same dimensions of the original parent case [U][I]with the exception of[/I][/U] straightening out the taper on the outside walls of the case, pushing the shoulder forward and changing the angle of the shoulder to 40 degrees. With that said the [I]original[/I] .280 Remington case length is [B]2.540[/B] thousandths long. Now the .280 Ackley Improved (SAAMI), (Nosler's version) measures [B]2.525[/B] thousandths case length. Now we have a [B].015[/B] thousandths difference in the overall length of the case. I am afraid that if I do what you are suggesting in this post to fire form my cases for the [B][U][I].280AI wildca[/I][/U][/B]t from the .280AI SAAMI, that I will end up with cases that are .015 thousandths too short because Nosler chose to shorten the SAAMI version by .015 thousandths [U][I]for "whatever" reason[/I][/U]. Again in my humble understanding of the caliber, "if" I choose the .280AI 40` (wildcat), I can use regular .280 Remington brass or .270 Winchester brass (no trimming), open the necks to 30 caliber, set a false shoulder by backing a .280 Remington full length sizing die out .015 thousandths and fire form my cases in the .280 AI 40` chamber. Wow lots of stuff going on here!! PLEASE if I am incorrect here.......................let me know, otherwise I'll probably be making some big mistakes. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
.270 AI vs .280 AI SAAMI vs .280 AI 40 degree information.
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