Looking for lead bullets for fire lapping

[fltbed]

Anyone have any soft (9-11 Bn) lead bullets laying around they would be willing to part with? (40-50)
Looking for 180-200 gr, unsized preferably, soft lead bullets to fire lap the barrel on my RIA 10mm. 

I have all the other stuff, plates, lapping compound, etc.  I just don't have any 40 cal lapping bullets and don't feel like spending $20 + shipping ordering them from Beartooth.  All I have are Poly/Moly coated bullets from Bear Creek and powder coated from Black Cherry.  The Bear Creeks are soft enough, I'm just not sure what effect the coating will have on the process.

You can PM me or reply to this thread.

Thanks

Jeff

[DM1906]

The absolute best bullets for fire lapping are swaged/knurled, like Hornady's. Nearly any swaged bullet will be at/near pure lead and perfectly soft. The lube knurling is usually the full length of the bearing surface, which is perfect for holding the abrasive. You can also use resized .45 lead balls (about 140 gr.), as long as your rolling plates don't under-size them. Roll them on a fine flat rasp file to knurl them to hold the compound.

If you don't find any, I can make some "softies".

BTW, 40-50 rounds through the same barrel will leave you with a near smooth-bore. If it isn't done within a dozen or less (typically 4-8), it isn't going to happen. By the time the rifling is well polished, the throat will be completely washed out. ....In case you didn't know.

[fltbed]

The absolute best bullets for fire lapping are swaged/knurled, like Hornady's. Nearly any swaged bullet will be at/near pure lead and perfectly soft. The lube knurling is usually the full length of the bearing surface, which is perfect for holding the abrasive. You can also use resized .45 lead balls (about 140 gr.), as long as your rolling plates don't under-size them. Roll them on a fine flat rasp file to knurl them to hold the compound.

If you don't find any, I can make some "softies".

BTW, 40-50 rounds through the same barrel will leave you with a near smooth-bore. If it isn't done within a dozen or less (typically 4-8), it isn't going to happen. By the time the rifling is well polished, the throat will be completely washed out. ....In case you didn't know.

Thanks for your response but the lapping project is on hold due to the fact I had to return the Rock due to the throat gouges showing up after firing it.  Also, had the leads on two lands go missing.
Probably a metal chip scratched the throat area when they were reaming the chamber and weakened that area.  Shooting it just broke them off.  I posted a pic in my 10mm firearm thread.

On another note...you can fire lap in 4-8 rounds?  What grit compound do you start with?   
I developed a process during my time as a gunsmith, working up to a high polish.  Normally takes 20-40 bullets depending on how bad the bore is.  And no, I never washed out a chamber throat or ended up with a smooth bore.

Had a buddy invent a better process using a clay like abrasive under pressure.  He used to do barrel lapping for $50 + shipping.  Worked real good, real fast.  Discovered a lot of other applications for it.  Sold the company ten years ago and retired to Florida.  Unfortunately, the new owners of the process have no interest in continuing dealing with individuals and only sell to other big manufacturers.https://www.kennametal.com/en/products/precision-surface-solutions.html

Jeff