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Question on Lead RN

This is a discussion on Question on Lead RN within the MP Reloading forums, part of the Smith & Wesson MP Forum category; Haven't heard of any semi auto smiths having polygonal rifling, but I've had 3 smith reps say the m&p r8 revolver has polygonal rifling as ...

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Old March 19th, 2015, 03:10 PM   #16
Join Date: Aug 2013
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Haven't heard of any semi auto smiths having polygonal rifling, but I've had 3 smith reps say the m&p r8 revolver has polygonal rifling as the main difference between it and the trr8. I'll have to look next time I clean my r8.
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Old March 31st, 2015, 02:10 AM   #17
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I've shot plenty of hardcast lead through M&Ps. Works just fine, just takes a little more effort to clean the lube / minor leading out of the barrel.
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Old April 2nd, 2015, 06:39 PM   #18
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I shot some of them last weekend. I was fairly disappointed. Leaded up kind of bad after 30 rounds and I stopped. It was a pain to get the lead out of the barrel when I cleaned the Shield tonight.

The bullets were Carroll Magnum Alloy Cast Bullets. Sized and Lubricated. 125 grain Roundnose Bevel Base. Supposedly match grade.

Might have been the load but it was not hot. It was 4.2 grain of Unique.
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Old April 3rd, 2015, 06:04 AM   #19
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Getting the lead out

Sorry to hear they didn't work out. The worst lead bullet is an undersized hardcast bullet. The hardcast won't bump up to the proper size to seal off the gases if it is too narrow for the barrel. The gas cutting will vaporize the lead which is then deposited on the barrel ahead of the bullet. Properly sized bullets are the best, next comes soft bullets which may have a chance of sealing the bore by expanding slightly due to the pressure of the gases.

Get a snug fitting bore mop and wrap a few strands of Chore Boy around it. Get the real copper Chore Boy, not the copper plated steel stuff at the dollar store.

You can also use Bronze Wool (available at many Ace HW stores or Lowes/Home Depot).

This is all you need:

It's best to do this outside. It only takes about a minute of running this back and forth in your barrel and all the lead will come out in "sparkly" dust when you pull the mop out.

Don't give up on lead, just remember "proper fit is king" when using lead bullets.
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