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Rifles, Reloading, Optics, Equipment
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<blockquote data-quote="NesikaChad" data-source="post: 326565" data-attributes="member: 7449"><p>Ok, you've got an Ackley case which means you start out with a factory case and blow it up to the new chamber like a balloon inside a piece of PVC pipe.</p><p></p><p>The key to getting the Ackley stuff right is in the initial fire forming. Here's a grossly over exaggerated example to illustrate the point.</p><p></p><p>Lets take the 22-250AI as the example. I build the gun set up for 80 grain bullets for long winded dog shots. I run down to the wally world and buy a box or two of 40 grain verminator bullets and off I go to the range to fireform my cases.</p><p></p><p>That is my first mistake and here's why:</p><p></p><p> In order for the AI to work right during fire forming I have to make sure the *** end of the case is shoved up tight against the bolt face. The only way to do this when you have a cartridge that starts out physically smaller than the chamber is to seat the bullet long so that it has a good healthy bite into the lands. You effectively headspace the initial fire forming off the throat and the bolt face instead of the shoulder because the cartridge is no where's near the shoulder yet.</p><p></p><p>What happens if you fail to do this is the striker pushes the whole thing forward until something stops forward motion, be it either the shoulder of the chamber or the throat of the barrel. Pressure acts on everything it touches at a right angle. This means it's pushing forward, outward, and REARWARD because there's nothing to stop it until the case contacts something that will resist being pushed around. (the chamber, bolt face) The rearward movement is what should concern you. Your case webs are being stretched out like the pivot girl after the homecoming game. Worse actually.</p><p></p><p>Start over with new brass, load conservatively, seat your bullets long so that it takes a bit of "umphff" to get the bolt closed, and then go shoot em. If you still have problems then I speculate you have a chamber problem, the reamer either went cockeyed or the headspace is somewhere in the bad place of tolerance.</p><p></p><p>Last, I personally avoid using dies from any company other than Redding or Wilson as the others seem to run on the tight side and this will only raise even more hell when fiddling with fireformed wildcats as the brass has to move even further.</p><p></p><p>Hope this helps.</p><p></p><p>Cheers,</p><p></p><p>Chad</p></blockquote><p></p>
[QUOTE="NesikaChad, post: 326565, member: 7449"] Ok, you've got an Ackley case which means you start out with a factory case and blow it up to the new chamber like a balloon inside a piece of PVC pipe. The key to getting the Ackley stuff right is in the initial fire forming. Here's a grossly over exaggerated example to illustrate the point. Lets take the 22-250AI as the example. I build the gun set up for 80 grain bullets for long winded dog shots. I run down to the wally world and buy a box or two of 40 grain verminator bullets and off I go to the range to fireform my cases. That is my first mistake and here's why: In order for the AI to work right during fire forming I have to make sure the *** end of the case is shoved up tight against the bolt face. The only way to do this when you have a cartridge that starts out physically smaller than the chamber is to seat the bullet long so that it has a good healthy bite into the lands. You effectively headspace the initial fire forming off the throat and the bolt face instead of the shoulder because the cartridge is no where's near the shoulder yet. What happens if you fail to do this is the striker pushes the whole thing forward until something stops forward motion, be it either the shoulder of the chamber or the throat of the barrel. Pressure acts on everything it touches at a right angle. This means it's pushing forward, outward, and REARWARD because there's nothing to stop it until the case contacts something that will resist being pushed around. (the chamber, bolt face) The rearward movement is what should concern you. Your case webs are being stretched out like the pivot girl after the homecoming game. Worse actually. Start over with new brass, load conservatively, seat your bullets long so that it takes a bit of "umphff" to get the bolt closed, and then go shoot em. If you still have problems then I speculate you have a chamber problem, the reamer either went cockeyed or the headspace is somewhere in the bad place of tolerance. Last, I personally avoid using dies from any company other than Redding or Wilson as the others seem to run on the tight side and this will only raise even more hell when fiddling with fireformed wildcats as the brass has to move even further. Hope this helps. Cheers, Chad [/QUOTE]
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