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Author Topic: paper patching a 50 bmg bullet  (Read 1576 times)

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Offline zrifleman

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paper patching a 50 bmg bullet
« on: June 29, 2005, 09:00:32 PM »
If this works, it solves two problems. The high price of bullets for 50 bmg and the ban at most range of using bullets with a steel core. A friend made me an adjustable mold that casts a .503 dia bullet using #2 alloy or harder. My first batch is set at about 750 grs. Paper patches are 3.140" long and 1.5" wide. I dropped the bullets in a jug of water right out of the mold and they are 20 bnh or better. If anybody is curious I will keep posting how this works out.
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Offline Castaway

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paper patching a 50 bmg bullet
« Reply #1 on: June 30, 2005, 01:39:24 AM »
Interesting!  Are you going to fire this monster from a single shot or auto-loader?
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Offline zrifleman

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paper patching a 50 bmg bullet
« Reply #2 on: June 30, 2005, 08:30:20 PM »
The rifle is a single shot. Paper patch bullets have been fired in 30 cal up to 3000 fps with no lead. Years ago I loaded 500 gr PP in my .458 win mag with 70 grs of IMR 3031 without any lead problem. So-we shall see? This is going to be a challenge. The muzzle brake is a little tight and may need to be opened up.
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Offline KSR

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paper patching a 50 bmg bullet
« Reply #3 on: July 05, 2005, 02:56:43 PM »
I would look down the bore every shot to make sure you don't have any patching in the muzzle brake. Otherwise have fun.  :grin:
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Offline rockrat

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Re: paper patching a 50 bmg bullet
« Reply #4 on: September 03, 2006, 01:21:30 PM »
Only thing I would be concerned with, was the patch starting to come off in the muzzle brake and causing the bullet to strike the brake.  Otherwise, let us know how it works as I have a 705 gr mould for a PP bullet that I have been thinking of trying in the big 50.  Otherwise I have just started playing with a 715 gr bullet out of my AR50.   Two and a half inch group so far, at 100yds, but I found out alot at the range today.  My LAR will go slightly over 1" at that range at 1937fps.  Going to increase the powder charge to get 2200fps out of the 715gr bullet and see how it works.
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Offline Black Jaque Janaviac

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Re: paper patching a 50 bmg bullet
« Reply #5 on: September 05, 2006, 06:41:12 AM »
I am curious, not because of the caliber, but because of other parameters you are using similar to mine.

One, you're using smokeless powder and probably pushing velocities similar to my .35 Whelen.  Two, you're casting with wheel-weight alloy, which is what I'm using.  Three you're mold is .503 diameter - is that bore diameter?  groove diameter?

When you're using smokeless powder, let me know if you have better luck with full charges of slow powders or reduced charges of fast powders. 

What is your after-patching diameter?  How does that compare to bore and groove diameters?

And finally, how fast can you run air cooled wheel-weight alloy?
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