I like to select the powder load such that a double charge will overfill the case.

Double charge? I do a load development and determine the exact amount of powder that works the best as far as MV and accuracy.

used a paperclip, with a bent end to feel the bottom of the case perimeter; to reject worn cases

Interesting, do you know what he's feeling for?

I thought you only loaded 6.5mm for the big guy. A .243 is big enough to be effective, good choice.

I've got 6.5 yes, and also larger calibres like .308 and greater. I don't say or show them all here, one never knows who's watching.

I'd like to do some casting but am not currently set up for it. A good skill I think.