My way!
Accurate BPCR Paper Patch Bullets
The following photos show how I get great accuracy from my 45 2 7/8 Shiloh rifle. I cast these 525 gr. 1-20 alloy bullets from a Buffalo Arms Co. PP Money Bullet mould. The bullets...as cast come out of the mould at a diameter of .446" and I then run them through a Fred Cornell .4445" sizing die. I then wet patch with a paper of .0022" thickness, dry them on a warming plate and when dry, I apply a light film of lube to the exterior of the patch and then run them back through the same sizing die which brings them down to a finished OD of .4470". These are then inserted atop a .060" veggie wad which sits below the mouth of the case .140". The BP is previously compressed to a depth that will give me the .140" dimension at the top of the case; included above the powder and sitting atop it is a .030" veggie wad and betwixt the two veggie wads is a lube cookie of .240" thickness! The below photo shows a patched bullet sitting atop the push rod before I run it up into the sizing die!
SwageOp by Sharps45 2 7/8, on Flickr
Bullet upon partial exit from Fred Cornell sizing die:
SwageOp2 by Sharps45 2 7/8, on Flickr
Loaded cartridges with view of others waiting to have bullet seated. Before seating the bullet I run the as seen below cases with wads showing into a taper crimp die for a PARTIAL TAPER which allows me to seat the patched bullet without having a lot of 'slop' betwixt the exterior of the bullet and interior of the case. When the bullet is fully seated with base against the wad...I then give the case the final very slight taper crimp!
RFS by Sharps45 2 7/8, on Flickr
Photo of hot plate which is nothing other than a device made to fit under an RCBS sizing/lube tool designed to warm lube for bullet sizing!
Hotplate by Sharps45 2 7/8, on Flickr
My finished bullet diameter is at .4470"; .003" UNDER bore diameter! I had been told by the Rdnck that under bore sized bullets shoot well for him but I was doubtful! It seems however that oft times it pays to listen to those that have more experience! This method works for me. Recently I got some bullets cast up at a 1-40 alloy and I fired 10 rounds this morning from 500 yards that hit pretty much dead center of a 20" clanger and I can live with that!!