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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Bullet design for 30-30
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<blockquote data-quote="Deleted member 46119" data-source="post: 1208464"><p>Hi Steve, </p><p></p><p>I wish you all that can be had in luck getting drawn.</p><p></p><p>Repeating the obvious but as I understand it, a smaller hollow point meplat will allow you to design a bullet with better ballistics. Please correct me if I'm wrong on that. The "pointier" design goal has to be balanced against the problem of ignition under recoil for tube magazines.</p><p></p><p>I've run Barnes, XTeme copper plated and Meister Hard Cast Lead. I know you can come up with ballistics better than those. The Barnes hollow point is much bigger than the primer so the meplat rides on the brass, no ignition problem.</p><p></p><p>Based on what I see with these bullets in my '66 (actaully a 1966 anniversary edition), my lever 45 Long Colt (uberti), lever 45-70 (real 1886 mfg 1888) and the "elevator" action that lifts the round up from the "follower" after it has fed backwards from the spring in the magazine...</p><p></p><p>If the hollow point is smaller than the bevel for the primer, it "may" catch on the bevel. Causing a jammed cartridge. At the moment, I have no way to test this so I may be worrying about something that could happen but in reality never will. </p><p></p><p>If the ID if the hollow point is the same as the ID of a primer then the bullet surface will ride on the curved part of the primer. I think that would prevent primer ignition on recoil. This is the smallest meplat I would expect to be "safe" from accidental ignition.</p><p></p><p>If I may be so bold. A possible testing method: This may be a stupid idea but it is safer than a fully loaded round going off in a mag tube.</p><p></p><p>make a heavy wall tube that will hold loaded rounds under spring tension like a tubular magazine with a screw in plug to lock the rounds in.</p><p>make the spring retainer sacrificial, as in light weight and easily blown out the end.</p><p>make enough bullets with the smallest meplat you dare and load them with primers only.</p><p>Load the primer only rounds into the tube and put the plug in. </p><p>Find a way to "SAFELY" slam the tube down on the plug end to simulate recoil. </p><p></p><p>If you can't get them to go off, dent the primers or hang up in the action. You got the meplat dimension. </p><p></p><p>I don't know if any of this is any help or anything you haven't already thought of.</p><p></p><p>If you make it I will buy it.</p></blockquote><p></p>
[QUOTE="Deleted member 46119, post: 1208464"] Hi Steve, I wish you all that can be had in luck getting drawn. Repeating the obvious but as I understand it, a smaller hollow point meplat will allow you to design a bullet with better ballistics. Please correct me if I'm wrong on that. The "pointier" design goal has to be balanced against the problem of ignition under recoil for tube magazines. I've run Barnes, XTeme copper plated and Meister Hard Cast Lead. I know you can come up with ballistics better than those. The Barnes hollow point is much bigger than the primer so the meplat rides on the brass, no ignition problem. Based on what I see with these bullets in my '66 (actaully a 1966 anniversary edition), my lever 45 Long Colt (uberti), lever 45-70 (real 1886 mfg 1888) and the "elevator" action that lifts the round up from the "follower" after it has fed backwards from the spring in the magazine... If the hollow point is smaller than the bevel for the primer, it "may" catch on the bevel. Causing a jammed cartridge. At the moment, I have no way to test this so I may be worrying about something that could happen but in reality never will. If the ID if the hollow point is the same as the ID of a primer then the bullet surface will ride on the curved part of the primer. I think that would prevent primer ignition on recoil. This is the smallest meplat I would expect to be "safe" from accidental ignition. If I may be so bold. A possible testing method: This may be a stupid idea but it is safer than a fully loaded round going off in a mag tube. make a heavy wall tube that will hold loaded rounds under spring tension like a tubular magazine with a screw in plug to lock the rounds in. make the spring retainer sacrificial, as in light weight and easily blown out the end. make enough bullets with the smallest meplat you dare and load them with primers only. Load the primer only rounds into the tube and put the plug in. Find a way to "SAFELY" slam the tube down on the plug end to simulate recoil. If you can't get them to go off, dent the primers or hang up in the action. You got the meplat dimension. I don't know if any of this is any help or anything you haven't already thought of. If you make it I will buy it. [/QUOTE]
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Bullet design for 30-30
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