I have a lot of fun with mine. I was already making bullets and loading for .458" (45-70 & .460 WBY) bullets so it was an easy choice. I also didn't want to mess with needing different magazines, just use Lancer 5.56 mags and you are set.
I primarily shoot cast bullets that I Powder Coat and gascheck if lighter weight. Below is my all around shooting bullet, 360 gr. from a NOE mould that I use in both my SOCOM and my 45-70
NOE 354 gr web.jpg
For heavier shooting I cast a spire point 500 gr. bullet and then for really heavy bullets I can make the 600 gr. solid and 570 gr. HP pictured below.
NOE 600_570 gr. .458 web.jpg
Lastly I can make jacketed bullets from fired brass if I really want to.
Below is a 300 gr. JHP made out of a .45 ACP case and a 405 gr. made with a cut down .308 case.
458 300 jhp.jpg
458 405 jhp.jpg