Beautiful rifle. I would load it like the Rigby with a low pressure combination. Some say it works even better at the moderate velocities in the range of the 458 Lott.

Shot a 458 a fair amount and it's mainstay/jack rabbit load was a 350 gr. cast bullet. Performance was good and it made it fun to shoot and on the cheap too. Full power not so much as it was over my threshold. Shot it once prone never again and a standing bench is the way to go. Even though the 460 turns me into a cream-puff I have seen a number of women some very petite shoot it well. My alibi is E = MC2 the smaller gals just roll with the punch us heeman take it on the chin.

"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli