What has been the real world success for green horns lapping moulds for larger bullets. I'm planning a LEE 429-200 RF mould for plinking with my micro groove 444. It seems universal that the rifle will require at least .432 after sizing. If I get a smaller mould can I expect decent results from lapping as a first timer? I am mechanically inclined and once was a lathe operator in a Timken Bearing factory tool room so this is not foreign ground at least.
For experienced casters would you lap or beagle for 2 or 3 thou.?
Sizing will be with a RCBS LAM.