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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Necking down and changing shoulder angle?
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<blockquote data-quote="Brent" data-source="post: 26728" data-attributes="member: 99"><p>Thanks again for all your help 4mesh, your experiences have helped a great deal. I have a few more questions but, I'll have to scratch a few illistrations down on paper first to make sense out of them for you. </p><p></p><p>The shoulder area on the bushing I modified is a little rough still and could be polished up, thanks for the tip. The bushing had been flipped over to give me the sharper edge at the junction when I was done, it added about .030" - .050" length to it but left the bulge in the middle of the shoulder more apparent too. </p><p></p><p>My grandfather has a small lathe and could make some small bushings or what ever for me, but like you say, if they chamber now all I need to do is fireform them and get the die made to FL size them. </p><p></p><p>I could get him to make me a couple three bushings that fit in the 480/475 die that fit the body of the case tight as it formed the shoulder though. I guess he could make the 40 degree shoulder on all of them while making the hole progressively smaller so the brass moves forward instead of forcing it backward like it is for the most part now. </p><p></p><p>The bore diameter in the 480/475 die is .625" and the shoulder dia is .540" to start with. </p><p></p><p>If I had him make the first die bushing with a .480" hole and the next with a .440", then the third .400", the bushing I modified would probably take care of the rest alot better than it is right now, not to mention no bulge below the shoulder, ya think? </p><p></p><p>4mesh, no AutoCad here either. </p><p></p><p>I got your pics, they look pretty simple to make or does it just look that way? Is it just a threaded piece with a bore that holds the guide sleeve and it's the top of the die that has the angle and hole the correct size?</p><p></p><p>Is it pretty simple to cut the shoulder angle and bore in the die on a small lathe? I'm not sure what tooling my grandfather has to work with either. He's threaded things and done small OD and ID changes for me on several things before but, nothing with an angle inside it. I'll get a lathe someday soon.</p></blockquote><p></p>
[QUOTE="Brent, post: 26728, member: 99"] Thanks again for all your help 4mesh, your experiences have helped a great deal. I have a few more questions but, I'll have to scratch a few illistrations down on paper first to make sense out of them for you. The shoulder area on the bushing I modified is a little rough still and could be polished up, thanks for the tip. The bushing had been flipped over to give me the sharper edge at the junction when I was done, it added about .030" - .050" length to it but left the bulge in the middle of the shoulder more apparent too. My grandfather has a small lathe and could make some small bushings or what ever for me, but like you say, if they chamber now all I need to do is fireform them and get the die made to FL size them. I could get him to make me a couple three bushings that fit in the 480/475 die that fit the body of the case tight as it formed the shoulder though. I guess he could make the 40 degree shoulder on all of them while making the hole progressively smaller so the brass moves forward instead of forcing it backward like it is for the most part now. The bore diameter in the 480/475 die is .625" and the shoulder dia is .540" to start with. If I had him make the first die bushing with a .480" hole and the next with a .440", then the third .400", the bushing I modified would probably take care of the rest alot better than it is right now, not to mention no bulge below the shoulder, ya think? 4mesh, no AutoCad here either. I got your pics, they look pretty simple to make or does it just look that way? Is it just a threaded piece with a bore that holds the guide sleeve and it's the top of the die that has the angle and hole the correct size? Is it pretty simple to cut the shoulder angle and bore in the die on a small lathe? I'm not sure what tooling my grandfather has to work with either. He's threaded things and done small OD and ID changes for me on several things before but, nothing with an angle inside it. I'll get a lathe someday soon. [/QUOTE]
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Necking down and changing shoulder angle?
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