Way cool on your place of employment.
I've yet to obtain another BC barrel to send off, but as soon as I do I plan to send off for the 45-120 rechamber, cerra-coat and m-brake job.
.458" spitzers, I've yet to find a spitzer or any other round that explodes chucks like a .220 swift without having to hollow the nose out to nearly the jacketing. I use 300gr JHPs, then I use a drill press and jig to hollow them out to about 250grs +/-. Once you do that you have a flying ashtray..
Hits and misses are draumatic. Either a nice big puff of dust and grass, or giblets+grass+dust from the core passing thru to a backstop.