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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrelling- Tight Necks
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<blockquote data-quote="Zane in Oregon" data-source="post: 60646" data-attributes="member: 3696"><p>Thank you very much. Couple of questions. I had the leade angle cut at 1.5 degree as the smith said this is more accurate than the 3 degree. How does leade angle and depth of the throat, (bullet diameter) go together. Are you saying that the throat is cut .003 over bullet diameter, and on a certian angle, like 1.5 degree. I am just trying to learn as much as I can so that on future rifles I can really get what I want.</p><p></p><p>Also, my concentricity is running about .002 and I can't seem to get it any straighter. I may try a shallow cut in the case mouth (turned) as mentioned in another post on concentricity. Right now I'd say they average .002, with the extreme being .004 on the high end. I use redding bushing neck dies, with no expander plug, and an RCBS seating die. I had a Wilson type in line seating die and the conc. was not any better. The chamber on this barrel may not be within the .001 that is accepted as the fired brass has about .002 to .0025 runout before sizing. </p><p></p><p>Is the Bersin Tool the cure all to conc? Is the level of conc. that I am currently getting acceptable? I dunno. I test each loaded round for conc, and mark anything over .003. I have not, in 200 rounds been able to conclude that it is the cause of fliers. Like I said though, none are what I would consider terrible, with the extreme being about .004".</p><p></p><p>Thanks again.</p></blockquote><p></p>
[QUOTE="Zane in Oregon, post: 60646, member: 3696"] Thank you very much. Couple of questions. I had the leade angle cut at 1.5 degree as the smith said this is more accurate than the 3 degree. How does leade angle and depth of the throat, (bullet diameter) go together. Are you saying that the throat is cut .003 over bullet diameter, and on a certian angle, like 1.5 degree. I am just trying to learn as much as I can so that on future rifles I can really get what I want. Also, my concentricity is running about .002 and I can't seem to get it any straighter. I may try a shallow cut in the case mouth (turned) as mentioned in another post on concentricity. Right now I'd say they average .002, with the extreme being .004 on the high end. I use redding bushing neck dies, with no expander plug, and an RCBS seating die. I had a Wilson type in line seating die and the conc. was not any better. The chamber on this barrel may not be within the .001 that is accepted as the fired brass has about .002 to .0025 runout before sizing. Is the Bersin Tool the cure all to conc? Is the level of conc. that I am currently getting acceptable? I dunno. I test each loaded round for conc, and mark anything over .003. I have not, in 200 rounds been able to conclude that it is the cause of fliers. Like I said though, none are what I would consider terrible, with the extreme being about .004". Thanks again. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Barrelling- Tight Necks
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