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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Different types of rifling and there uses.
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<blockquote data-quote="J E Custom" data-source="post: 1350424" data-attributes="member: 2736"><p>Very interesting so far !! Keep them coming.</p><p></p><p>I to have my likes and dislikes based on building many rifles and seeing the results first hand.</p><p></p><p>I like three basic rifling grove counts and rifling designs. The first is 3 grove for ultra fast small caliber cartridges. With the right bullets (Light), they are amazing. But they are hard on heavier bullets or bullets with thin jackets.</p><p></p><p>For the mid calibers, 7mm to .338 I use 4,5 or 6 grove for consistent engraving of the bullet and good all round accuracy.</p><p></p><p>For the Big bores, .375 to .577 I like the 8 grove barrel because of the very heavy bullets and the positive engraving without jacket separation from the bullet core. Twist rates do have a bearing on the performance of all types of rifling, but we can discuss that on the next thread. (It will probably get more different opinions).</p><p></p><p>As to the design of the rifling, I haven't seen any difference in accuracy</p><p>of a ratchet, 5r or conventional design as long as you buy a premium barrel. The same thing goes for the cut rifling versus the buttoned rifling as long as they were both made properly and hand lapped, both types perform equally well. Some designs clean easier and foul less, but if they are properly lapped I have not seen any trend favoring one over the other.</p><p></p><p>When ordering a new barrel, I prefer to chose the rifling design and count first based on the type of bullet and caliber, then based on the bullet weight and shape (Design) and jacket type I will decide on the optimum twist rate that will complement the rifling design and the overall accuracy potential.</p><p></p><p>So in my opinion and experience, if you chose the optimum grove design and twist rate for your use, and a premium barrel combined with excellent smithing success is very possible.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1350424, member: 2736"] Very interesting so far !! Keep them coming. I to have my likes and dislikes based on building many rifles and seeing the results first hand. I like three basic rifling grove counts and rifling designs. The first is 3 grove for ultra fast small caliber cartridges. With the right bullets (Light), they are amazing. But they are hard on heavier bullets or bullets with thin jackets. For the mid calibers, 7mm to .338 I use 4,5 or 6 grove for consistent engraving of the bullet and good all round accuracy. For the Big bores, .375 to .577 I like the 8 grove barrel because of the very heavy bullets and the positive engraving without jacket separation from the bullet core. Twist rates do have a bearing on the performance of all types of rifling, but we can discuss that on the next thread. (It will probably get more different opinions). As to the design of the rifling, I haven't seen any difference in accuracy of a ratchet, 5r or conventional design as long as you buy a premium barrel. The same thing goes for the cut rifling versus the buttoned rifling as long as they were both made properly and hand lapped, both types perform equally well. Some designs clean easier and foul less, but if they are properly lapped I have not seen any trend favoring one over the other. When ordering a new barrel, I prefer to chose the rifling design and count first based on the type of bullet and caliber, then based on the bullet weight and shape (Design) and jacket type I will decide on the optimum twist rate that will complement the rifling design and the overall accuracy potential. So in my opinion and experience, if you chose the optimum grove design and twist rate for your use, and a premium barrel combined with excellent smithing success is very possible. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Different types of rifling and there uses.
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