Machine rests............have seen folks not use them correctly.
IMHO you need the rest, the windage base, bolted to sturdy bench and make everything repeatable, not just crank one in the inserts and let er rip.
Dunno what inserts available these days.

Pops has a Ransom and quite a few goodies. We got scary groups from some 1911's he did and the old E series Python.

Integral grip polymer guns...............dunno how you'd fit one of those to a rest.

Last edited by hookeye; 07/06/17.