cross thread help

[Phantom30]

have thread in PC land thought might I find more swagers over here than might know how to help follow link
http://castboolits.gunloads.com/showthread.php?327661-Sizing-a-Bore-Rider-Boolit

[aaronraad]

Seen and added my 2 cents.

[Phantom30]

came up with different approach thanks