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Rifles, Reloading, Optics, Equipment
Reloading
Arbor press seater
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<blockquote data-quote="QuietTexan" data-source="post: 2934652" data-attributes="member: 116181"><p>Wait what tool are you boring with?</p><p></p><p>You mean pre-bore with a cutting tool, then separately run the reamer without a pilot to chamber an actual barrel, correct? </p><p></p><p>Not sure how a chamber reamer is long enough to cut an in-line seating die in the wrong caliber, you'd still need a drill or boring bar or some kind of cutting tool to open up the top part of the die. Unless I've not paid attention and my in-line dies are excessively longer than necessary, but I'm measuring one of my reamers now and the throat section is only .620" long, not nearly enough for an inline die with a plunger. Just checked and the die for that chamber has a 1.1" "bore" section in the seating die, so the chamber reamer won't be enough on it's own.</p><p></p><p>I said take an LE WIlson 300 RUM inline seating die and bore out the seating stem section to 375 since because that doesn't involved having a 375 RUM reamer on hand. The chamber prints are the same all the way up to the shoulder between 300 and 375 RUM, to 0.0001" in length to the body/shoulder junction. If you wanted to get all fancy you could turn a new stem down, otherwise bush the old one.</p></blockquote><p></p>
[QUOTE="QuietTexan, post: 2934652, member: 116181"] Wait what tool are you boring with? You mean pre-bore with a cutting tool, then separately run the reamer without a pilot to chamber an actual barrel, correct? Not sure how a chamber reamer is long enough to cut an in-line seating die in the wrong caliber, you'd still need a drill or boring bar or some kind of cutting tool to open up the top part of the die. Unless I've not paid attention and my in-line dies are excessively longer than necessary, but I'm measuring one of my reamers now and the throat section is only .620" long, not nearly enough for an inline die with a plunger. Just checked and the die for that chamber has a 1.1" "bore" section in the seating die, so the chamber reamer won't be enough on it's own. I said take an LE WIlson 300 RUM inline seating die and bore out the seating stem section to 375 since because that doesn't involved having a 375 RUM reamer on hand. The chamber prints are the same all the way up to the shoulder between 300 and 375 RUM, to 0.0001" in length to the body/shoulder junction. If you wanted to get all fancy you could turn a new stem down, otherwise bush the old one. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Arbor press seater
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