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The Range
Ammo & Reloading
Made .308 brass from 270 brass
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<blockquote data-quote="criticalbass" data-source="post: 2368061" data-attributes="member: 711"><p>The only cases I currently form are 338-06 and 22-243. I open the case mouth on a 30-06 and load a 338 bullet. These shoot fine in the 338-06 and the first firing fire forms the brass. This increases the case volume. I am considering Ackleyizing the chamber to allow more case capacity and to extend case life. The 40 degree shoulder of the Ackley chamber is supposed to pretty much stop case stretch and is said to increase case life several fold. This ammo (regular 338-06) is available commercially, but it's quite expensive, hence forming 30-06 brass. </p><p></p><p>Weatherby once sold a rifle with this chambering. It was once a very popular wildcat in the Alaska panhandle since in one trip one might go from shooting tiny deer to having to stop a large attacking bear. Its performance is not far from the .338 Win Mag, but the recoil is much friendlier. Savage 110 makes a great platform.</p><p></p><p>The 22-243 was a necessary conversion to a 22-250 which someone built on a Turk Mauser action. It shot good groups but they made the chamber so large that the brass was not reloadable. Steve Baldwin, who has Mechanical Accuracy at Jones, reamed the chamber out to 22-243. To form the brass, I put unfired brass through the sizing die. Just a little lube down to the shoulder, and the .243 case mouth reduces to .224. This is probably the simplest brass forming process of all.</p><p></p><p>The little round is a screamer. I have to use light bullets since the twist is 1/14. If I rebarrel it'll be more like 1/9. There are some published loads that approach one mile/sec. Barrel life expectancy is not great, but my life expectancy isn't either. If I wear it out I'll just buy another barrel. This round can also be Ackleyized. I am a little surprised, considering its advantage over the 22-250, that someone hasn't chambered a rifle commercially. I think it'd be great for a Ruger Number one, though it would be easy enough to rechamber a #1 to 22-243.</p></blockquote><p></p>
[QUOTE="criticalbass, post: 2368061, member: 711"] The only cases I currently form are 338-06 and 22-243. I open the case mouth on a 30-06 and load a 338 bullet. These shoot fine in the 338-06 and the first firing fire forms the brass. This increases the case volume. I am considering Ackleyizing the chamber to allow more case capacity and to extend case life. The 40 degree shoulder of the Ackley chamber is supposed to pretty much stop case stretch and is said to increase case life several fold. This ammo (regular 338-06) is available commercially, but it's quite expensive, hence forming 30-06 brass. Weatherby once sold a rifle with this chambering. It was once a very popular wildcat in the Alaska panhandle since in one trip one might go from shooting tiny deer to having to stop a large attacking bear. Its performance is not far from the .338 Win Mag, but the recoil is much friendlier. Savage 110 makes a great platform. The 22-243 was a necessary conversion to a 22-250 which someone built on a Turk Mauser action. It shot good groups but they made the chamber so large that the brass was not reloadable. Steve Baldwin, who has Mechanical Accuracy at Jones, reamed the chamber out to 22-243. To form the brass, I put unfired brass through the sizing die. Just a little lube down to the shoulder, and the .243 case mouth reduces to .224. This is probably the simplest brass forming process of all. The little round is a screamer. I have to use light bullets since the twist is 1/14. If I rebarrel it'll be more like 1/9. There are some published loads that approach one mile/sec. Barrel life expectancy is not great, but my life expectancy isn't either. If I wear it out I'll just buy another barrel. This round can also be Ackleyized. I am a little surprised, considering its advantage over the 22-250, that someone hasn't chambered a rifle commercially. I think it'd be great for a Ruger Number one, though it would be easy enough to rechamber a #1 to 22-243. [/QUOTE]
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