I just bought the Lee Breech Lock Sizer Kit with the holder and 3 .501 bushings.
Why 3, to enlarge them to fit my .502 bore.
Anyway, the three bushings measure .501, .50125 and .5015 [may have got lucky]
Quality Control worked for me.
Simple and work well!
Plan to make .499, .4995 and .500 bushings for my other barrel.
and maybe a .502 and a .5025-.503 out of some pre hardened stock.
Why 3, to enlarge them to fit my .502 bore.
Anyway, the three bushings measure .501, .50125 and .5015 [may have got lucky]
Quality Control worked for me.
Simple and work well!
Plan to make .499, .4995 and .500 bushings for my other barrel.
and maybe a .502 and a .5025-.503 out of some pre hardened stock.