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1/22/2020 12:12:56 PM
Posted: 9/17/2009 8:38:02 PM EST
I ordered 1000 bullets from Precision Delta. They're .451" 230 grain FMJ. I was under the impression that they were fully encased in jacket material. These do not have a jacket on the bottom of the bullet. If you turn the bullet over you will see an exposed lead base.
The idea was to use them for plinking in my Kimber (45 ACP), Vaquero (45 Colt), and Encore (460 S&W).

I don't have any concern with them in the two little guns. Those things are running between 14,000 psi and 25,000 psi. I'm kinda worried about stuffing them in the 460 and blowing them out with 60,000+ psi.

How will the insane pressures of the 460 affect the bullet? Will it turn the exposed lead into an aerosol and lead the barrel? Will it try to expand the jacket like an old school Mini-ball? If the pressure does blow it's dress up, so to speak, will there be jacket and core separation through the muzzle brake? The gasses will be blowing around the eddge of the skirt when the bullet enters the free bored area of the muzzle brake. I don't want the skirt expanding and slamming the end of the brake on the way out. That could get ugly.
Link Posted: 9/17/2009 8:49:17 PM EST
The bullets are supposed to look like that. For the kimber and the vaquero, they will be fine. Maybe a little light for the Colt loads, not sure. As for the .460, I have no idea. It is a scorcher though!
Link Posted: 9/17/2009 10:21:01 PM EST
They will be fine in ACP loads. Probably ok in lighter loads in the .45 Colt but I am not too sure about the .460. Maybe in reduced loads but i am not so sure I would push it.
Link Posted: 9/18/2009 5:12:51 AM EST
I know the bullets are supposed to look like that. I've been reloading for 15 years. However, I'm fairly new to reloading the 460. It works at pressures much higher than most rifle calibers, including most of the ultra super deluxe magnums. In fact, it's the same working pressure as a 50 BMG but has just a wee bit less volume.

I'm concerned with the jacket separating and barrel leading. Perhaps there are other unforseen issues as well.
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