.270 brass'd make suitable cases, all right, but I'd prefer .25-06.
Two preliminary steps'd be necessary. (They won't form in just one pass. You can easily guess how I know!) � Start massaging the shoulder back with an 8x57mm Mauser sizer. � Continue massaging the shoulder back with a 7x57mm Mauser sizer backed-off about 0.10 inch.
The resulting case should then form properly in the .220 Howell sizer � and need only be trimmed, reamed, and probably annealed.
"Good enough" isn't.
Always take your responsibilities seriously but never yourself.
