bullbarrel033;
A bullet will NEVER be more perfect than when it falls from the mould. We size bullets to make them fit the particular weapon we are using. Commercial moulds have to be made to fit all models of guns of that particular caliber as much as possible. The only way to do that is to cast them oversize, then size them. However, sizing can only damage a bullet (understand it is NECESSARY to size the bullet as "fit is everything").
Schuetzen shooters use custom moulds made to cast a bullet to a specific size within .001" with a specific lead bullet alloy. Changing alloys changes the size of the bullet as cast. So, first you have to know the exact size that you need. Then you need to know EXACTLY what alloy you will be using. Then, the custom bullet mould maker can deliver. THOSE "as cast" bullets then must be cast as nearly perfect as humanly possible. When everything is done right, then loaded in a GREAT rifle, with a GREAT shooter, then you get this:
http://i269.photobucket.com/albums/j...tonsTarget.jpg
This target was shot by Jim Borton. He has since done better in competition. The group size (10 shots at 200 yards benchrest) is .707". Jim has shot a number of perfect scores at 200 yards in competition at the ASSRA Nationals.
Dale53