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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Difference Between Button/Cut Rifling?
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<blockquote data-quote="Moman" data-source="post: 349482" data-attributes="member: 10494"><p>Couple questions for you guys. In Phorwaths post above, he mentions pressure increases due to bore wear. I never thought about this but seems to make sense. I assume that with the roughness of the bore/throat, and the increased friction on the bullet, the bullet is not sliding through the rifling as easily. Wish I could word that better but you know what I mean. I shot my 300 WM again today, this gun has a lot continuous throat erosion. The throat has eroded another .010 in the last 30 rounds, close to .060 since new. I noticed today that the primers are flattening. This is all with the same components and lot #'s that I have been using for a few years. I've never had flattened primers before. Do you think it is possibly why this is happening?</p><p> </p><p>Also, I have a Broughton 5C barrel sitting here for it. Going to keep the caliber the same. Once this is rebarreled, can I expect it to shoot cold bore shots accurately? I would think the answer is yes but would like to hear what you guys have to say on it. Whether or not button barreling induces more stress, Broughton says their barrels are triple stressed relieved. Shouldn't this eliviate the first shot being off mark?</p></blockquote><p></p>
[QUOTE="Moman, post: 349482, member: 10494"] Couple questions for you guys. In Phorwaths post above, he mentions pressure increases due to bore wear. I never thought about this but seems to make sense. I assume that with the roughness of the bore/throat, and the increased friction on the bullet, the bullet is not sliding through the rifling as easily. Wish I could word that better but you know what I mean. I shot my 300 WM again today, this gun has a lot continuous throat erosion. The throat has eroded another .010 in the last 30 rounds, close to .060 since new. I noticed today that the primers are flattening. This is all with the same components and lot #'s that I have been using for a few years. I've never had flattened primers before. Do you think it is possibly why this is happening? Also, I have a Broughton 5C barrel sitting here for it. Going to keep the caliber the same. Once this is rebarreled, can I expect it to shoot cold bore shots accurately? I would think the answer is yes but would like to hear what you guys have to say on it. Whether or not button barreling induces more stress, Broughton says their barrels are triple stressed relieved. Shouldn't this eliviate the first shot being off mark? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Difference Between Button/Cut Rifling?
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