After reading about neck tension in the archives, I ordered a Lyman "M" die for .357 Magnum and have a couple of questions:
Are the plugs that come with the die usually enough to accommodate cast bullets as-is (I'm guessing a couple of thousandths over groove diameter?), or do you frequently have to have a custom plug made?
I'm shooting a fixed-chamber rifle. For practice loads, can I get away with just decapping and expanding the neck with the "M" die? I would of course resize cases for hunting loads to assure proper feeding.