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Rifles, Reloading, Optics, Equipment
Reloading
7mm-300WSM wildcat
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<blockquote data-quote="Pdvdh" data-source="post: 271579" data-attributes="member: 4191"><p>I just used a Redding Neck Bushing style neck sizing die to drop a 300 RUM case neck to 7mm RUM in a one neck bushing step last night. Before doing so, I started/coned the 300 RUM case neck down to less than .311 with a 25 RUM full length resizing die so that the case neck was able to enter the .311" diameter Redding neck bushing. After that, no problems using the neck bushing to take the 300 RUM case neck down to the 7mm RUM case neck diameter with the single .311" Redding neck bushing.</p><p></p><p>Other than using a conventional full length sizing die, as I suggested in an earlier post, I don't believe you should expect to get minimal case neck runouts using multiple Redding neck bushings until after you've fireformed your sized down cases in the chamber of your rifle.</p><p></p><p>But if you use a full length resizing die, then as long as the die is quality & concentric, the wildcatted case should be pretty uniform as it comes out of the full-length resizing die.</p><p></p><p>I anneal my case necks and shoulders after working them to the extent of sizing down a full caliber.</p></blockquote><p></p>
[QUOTE="Pdvdh, post: 271579, member: 4191"] I just used a Redding Neck Bushing style neck sizing die to drop a 300 RUM case neck to 7mm RUM in a one neck bushing step last night. Before doing so, I started/coned the 300 RUM case neck down to less than .311 with a 25 RUM full length resizing die so that the case neck was able to enter the .311" diameter Redding neck bushing. After that, no problems using the neck bushing to take the 300 RUM case neck down to the 7mm RUM case neck diameter with the single .311" Redding neck bushing. Other than using a conventional full length sizing die, as I suggested in an earlier post, I don't believe you should expect to get minimal case neck runouts using multiple Redding neck bushings until after you've fireformed your sized down cases in the chamber of your rifle. But if you use a full length resizing die, then as long as the die is quality & concentric, the wildcatted case should be pretty uniform as it comes out of the full-length resizing die. I anneal my case necks and shoulders after working them to the extent of sizing down a full caliber. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
7mm-300WSM wildcat
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