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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Musings on barrel life...
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<blockquote data-quote="James Jones" data-source="post: 144358" data-attributes="member: 8843"><p><strong>Re: Thanks!</strong></p><p></p><p>I think that cost is the biggest factor in the barrel makers choice of barel steel , 17-4 is a good bit more expensive , granted it will likley last longer but how much? maybe 20% and if the barrel cost 50% more whats the point? I have a barrel made from 17-4 its made by Lothar Walther for BlackStar company then electo polished by them. The 17-4 is a bit harder than 416 but not realy any worse than CM. If you look at the hardness of the SS barrel compaired to CM you will se that the CM is harder but more prone to "fire cracking" and as a side note CM barrels don't have any carbide in them but carbon thats what makes them harder.</p><p></p><p>As for the land and groove debate , I think that the idea is that the 3 groove barrels have more surface area on the lands to wear so in theory they will not erode away as fast but as mentiond the increased surface area makes for more roungh surface to eat at the bullet.</p><p>Their are some very accurate poly barrels out their , like mantioned the barrels that Tubb uses also the H&amp;K PSG-1 noted as being the most accurate semi auto rifle made uses this style rifling</p><p></p><p>One of these days after I hit the lotto , I'm going to buy a pile of barrels cut riffled poly and buttoned and shoot them all out in the same caliber to get an accurate "truth" about what last longer</p></blockquote><p></p>
[QUOTE="James Jones, post: 144358, member: 8843"] [b]Re: Thanks![/b] I think that cost is the biggest factor in the barrel makers choice of barel steel , 17-4 is a good bit more expensive , granted it will likley last longer but how much? maybe 20% and if the barrel cost 50% more whats the point? I have a barrel made from 17-4 its made by Lothar Walther for BlackStar company then electo polished by them. The 17-4 is a bit harder than 416 but not realy any worse than CM. If you look at the hardness of the SS barrel compaired to CM you will se that the CM is harder but more prone to "fire cracking" and as a side note CM barrels don't have any carbide in them but carbon thats what makes them harder. As for the land and groove debate , I think that the idea is that the 3 groove barrels have more surface area on the lands to wear so in theory they will not erode away as fast but as mentiond the increased surface area makes for more roungh surface to eat at the bullet. Their are some very accurate poly barrels out their , like mantioned the barrels that Tubb uses also the H&K PSG-1 noted as being the most accurate semi auto rifle made uses this style rifling One of these days after I hit the lotto , I'm going to buy a pile of barrels cut riffled poly and buttoned and shoot them all out in the same caliber to get an accurate "truth" about what last longer [/QUOTE]
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Musings on barrel life...
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