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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
22-250AI or 22 creed
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<blockquote data-quote="benchracer" data-source="post: 1401620" data-attributes="member: 22069"><p>For the 22 Creedmoor shooters, what is your actual fired case capacity? I am seeing capacity stated @ 52 grains, is that an accurate figure?</p><p></p><p>Here is why I am asking:</p><p></p><p>My fired 22-250 brass measures 45.5 grains. From what I can determine, the AI version gains about 10%, which would put AI case capacity around 50 grains. If those numbers are accurate, the claims of 22 Creedmoor running off and leaving the 22-250 AI are setting off my BS detector. No way is that happening on a 2 grain difference (approx. 4%, which translates to about a 1% velocity gain) in case capacity, especially when the 22-250 is SAAMI spec'd @ 65k psi.</p><p></p><p>I see a lot of folks making a big deal about fire forming. Since both cartridges are handloader's cartridges, there is no factory ammo involved. Load development for any serious accuracy involves once-fired brass. Ergo, regardless of whether or not one is moving the shoulder or removing case taper, BOTH cases are being fireformed prior to load development. I am seeing quite a few 22 Creedmoor shooters who are starting out with 22-250 brass, which strongly suggests there is very little difference in potential. Moreover, 22-250 AI can utilize factory 22-250 ammo, which is an option not presently available with the Creedmoor.</p><p></p><p>While I have no doubt the 22 Creedmoor is/will be an excellent cartridge, the claims being made about this cartridge strike me as a continuation of the Creedmoor Kool-Aid.</p></blockquote><p></p>
[QUOTE="benchracer, post: 1401620, member: 22069"] For the 22 Creedmoor shooters, what is your actual fired case capacity? I am seeing capacity stated @ 52 grains, is that an accurate figure? Here is why I am asking: My fired 22-250 brass measures 45.5 grains. From what I can determine, the AI version gains about 10%, which would put AI case capacity around 50 grains. If those numbers are accurate, the claims of 22 Creedmoor running off and leaving the 22-250 AI are setting off my BS detector. No way is that happening on a 2 grain difference (approx. 4%, which translates to about a 1% velocity gain) in case capacity, especially when the 22-250 is SAAMI spec'd @ 65k psi. I see a lot of folks making a big deal about fire forming. Since both cartridges are handloader's cartridges, there is no factory ammo involved. Load development for any serious accuracy involves once-fired brass. Ergo, regardless of whether or not one is moving the shoulder or removing case taper, BOTH cases are being fireformed prior to load development. I am seeing quite a few 22 Creedmoor shooters who are starting out with 22-250 brass, which strongly suggests there is very little difference in potential. Moreover, 22-250 AI can utilize factory 22-250 ammo, which is an option not presently available with the Creedmoor. While I have no doubt the 22 Creedmoor is/will be an excellent cartridge, the claims being made about this cartridge strike me as a continuation of the Creedmoor Kool-Aid. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
22-250AI or 22 creed
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