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FrankenMauser · September 5, 2012, 06:00 PM

If you want to lap a barrel for use with lead, be sure to go with 280 grit as an absolute minimum / 320 grit preferred.

I've never compared different brands, but several cast bullet manufacturers recommend only "Clover" brand valve lapping compound.
The 4 oz part number for 320 grit is 1A-51803 but 280 and 400 grit are easier to find. (A-51803 for 280, 2A-51803 for 400)
(The label may carry the Fel-Pro brand name, as well; since Fel-Pro owns them.)

September 5, 2012, 06:00 PM	#27
FrankenMauser Senior Member Join Date: August 25, 2008 Location: In the valley above the plain Posts: 13,424	If you want to lap a barrel for use with lead, be sure to go with 280 grit as an absolute minimum / 320 grit preferred. I've never compared different brands, but several cast bullet manufacturers recommend only "Clover" brand valve lapping compound. The 4 oz part number for 320 grit is 1A-51803 but 280 and 400 grit are easier to find. (A-51803 for 280, 2A-51803 for 400) (The label may carry the Fel-Pro brand name, as well; since Fel-Pro owns them.) __________________ Don't even try it. It's even worse than the internet would lead you to believe.