(quoted from post at 05:10:29 03/11/15) The problem is that the '86 National Firearms Act decided that we needed to do something about 'cop killer' bullets that could defeat the soft body armor used by LE. Their thinking was that since most instances of an officer being shot happened with pistols, banning AP ammo that will fit a pistol would be a good idea.
(quoted from post at 06:56:04 03/11/15) I've been a life member of NRA since the mid-eighties, but they lost my support after they went full-scale character assassination on John McCain back in 2000. Their chosen candidate and his cronies then spent the next eight years destroying our country. These days the NRA's primary interest isn't gun rights, it's "what can we do to help the GOP?"
(quoted from post at 10:01:29 03/11/15)
A cast lead bullet can be fired in .30 rifles at up to about 2000 feet per second with hunting accuracy. [b:07968b779c]Faster than that an the accuracy falls off badly due to air friction melting the bullet. [/b:07968b779c]
KEH
(quoted from post at 17:58:02 03/11/15)
Well, I don't remember the source of my info on the
melting bullets, but it was from a reliable
publication some time ago. I pushed a 200 gr lead
bullet at maybe 2150 fps and accuracy went away
seriously. I'll have to figure out some way to
capture the bullet undamaged and see what the
condition of it is.
KEH
(quoted from post at 16:18:18 03/14/15) I have a bunch of 55 gr .243 bullets that can't be loaded up to specs or they disintragate before reaching the target. They show a puff of smoke about 50 to 100 feet from the muzzle. They are jacketed soft points from a major manufacturer. I think they spin so fast that they fly apart.
(quoted from post at 04:48:59 03/15/15)(quoted from post at 16:18:18 03/14/15) I have a bunch of 55 gr .243 bullets that can't be loaded up to specs or they disintragate before reaching the target. They show a puff of smoke about 50 to 100 feet from the muzzle. They are jacketed soft points from a major manufacturer. I think they spin so fast that they fly apart.
I've never seen it myself that I recall but it's been reported by enough people I have confidence in that I think it does happen. In fact, I seem to remember one type of bullet that may have been marked right on the box that it was not intended to be used past a certain speed. Rotational forces can be figured, but it's way, way past any math I can understand. A super thin jacket, a fast rifling twist and a lot of speed can cause it. Of course, you put the same bullet in a 22 Hornet or 218 Bee and it would do fine.
(quoted from post at 12:30:01 03/15/15)(quoted from post at 04:48:59 03/15/15)(quoted from post at 16:18:18 03/14/15) I have a bunch of 55 gr .243 bullets that can't be loaded up to specs or they disintragate before reaching the target. They show a puff of smoke about 50 to 100 feet from the muzzle. They are jacketed soft points from a major manufacturer. I think they spin so fast that they fly apart.
I've never seen it myself that I recall but it's been reported by enough people I have confidence in that I think it does happen. In fact, I seem to remember one type of bullet that may have been marked right on the box that it was not intended to be used past a certain speed. Rotational forces can be figured, but it's way, way past any math I can understand. A super thin jacket, a fast rifling twist and a lot of speed can cause it. Of course, you put the same bullet in a 22 Hornet or 218 Bee and it would do fine.
I've read that the most effective remedy,without giving up speed is to slow the rifeling way down.
(quoted from post at 14:38:15 03/15/15) As far as cast lead bullets are concerned. No, they don't melt, but depending on the quality of the molding (seams from the mold showing) and purity of the lead can and will greatly affect bullet performance. The faster the velocity the more pronounced any defect is going to be.
Rick
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