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Long Range Hunting & Shooting
What’s your five? 5 Calibers to do it all...
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<blockquote data-quote="Wallie" data-source="post: 2141240" data-attributes="member: 107256"><p>The secret to AI cartridges is in the headspacing, at least as far as I've seen. In any given cartridge the go/no-go gauge dimensions are .004-.008" longer for the AI version. I surmise the standard was set that way so folks could rechamber an existing rifle, and fully clean up the previous chamber. That is probably why people have developed an dogmatic aversion to fireforming brass, because in that circumstance it really needs to be a special operation involving a false shoulder, a jammed bullet or other such contrivance.</p><p>I started headspacing my AI chambers just as if they are the parent (vanilla) version, and the advantages were immediate! Zero special consideration required, just load and shoot with the same accuracy as fireformed brass, albeit with less case capacity. </p><p>I've even found that pressure acts as if the brass is already AI sized, so unless you are running a compressed load and actually need the improved case capacity to physically fit the desired charge weight (volume) of powder you don't even need a different charge weigh while using virgin brass!</p></blockquote><p></p>
[QUOTE="Wallie, post: 2141240, member: 107256"] The secret to AI cartridges is in the headspacing, at least as far as I’ve seen. In any given cartridge the go/no-go gauge dimensions are .004-.008” longer for the AI version. I surmise the standard was set that way so folks could rechamber an existing rifle, and fully clean up the previous chamber. That is probably why people have developed an dogmatic aversion to fireforming brass, because in that circumstance it really needs to be a special operation involving a false shoulder, a jammed bullet or other such contrivance. I started headspacing my AI chambers just as if they are the parent (vanilla) version, and the advantages were immediate! Zero special consideration required, just load and shoot with the same accuracy as fireformed brass, albeit with less case capacity. I’ve even found that pressure acts as if the brass is already AI sized, so unless you are running a compressed load and actually need the improved case capacity to physically fit the desired charge weight (volume) of powder you don’t even need a different charge weigh while using virgin brass! [/QUOTE]
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What’s your five? 5 Calibers to do it all...
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