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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
First custom rifle is here and i think its a keeper!!!!!
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<blockquote data-quote="MontanaRifleman" data-source="post: 853568" data-attributes="member: 11717"><p>I think there may be some confusion here? As in case design vs reamer specs and clearance.</p><p></p><p>What I am talking about is the case itself. When I was first considering the 270 Montana (and others), I was thinking of blowing the parent case web out from the spec'd .445 to .450 (The actual virgin brass measurement is about .442) I called Dave to ask him his opinion on that and he recommended that I NOT blow the web out at all and that infact a lot of guys decrease the web diameter to help keep the primer pockets tight. This is exactly what he told me. So I decided to go with the actual new virgin brass dimensions of .442 This is what the Hornady custom dies are spec'd to. The sized case will be .442 at the web.</p><p></p><p>Now, as for the reamer, I was leaning to 2 thou clearance (.444) and he strongly recommended I go with 3 thou clearance (.445) and that is what the reamer print reflects at this moment. He also said to go with 4 thou clearance at the shoulder because of the shoulders radius which is over my head, but he's the expert and I went with his recommendation.</p></blockquote><p></p>
[QUOTE="MontanaRifleman, post: 853568, member: 11717"] I think there may be some confusion here? As in case design vs reamer specs and clearance. What I am talking about is the case itself. When I was first considering the 270 Montana (and others), I was thinking of blowing the parent case web out from the spec'd .445 to .450 (The actual virgin brass measurement is about .442) I called Dave to ask him his opinion on that and he recommended that I NOT blow the web out at all and that infact a lot of guys decrease the web diameter to help keep the primer pockets tight. This is exactly what he told me. So I decided to go with the actual new virgin brass dimensions of .442 This is what the Hornady custom dies are spec'd to. The sized case will be .442 at the web. Now, as for the reamer, I was leaning to 2 thou clearance (.444) and he strongly recommended I go with 3 thou clearance (.445) and that is what the reamer print reflects at this moment. He also said to go with 4 thou clearance at the shoulder because of the shoulders radius which is over my head, but he's the expert and I went with his recommendation. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
First custom rifle is here and i think its a keeper!!!!!
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