Mike, I had a 1964 vintage Browning Safari and it was becoming a custom "G-buster", but, I had NINE other custom projects with Martini's and other smiths at the time-year and a half ago-so, sold it, dies, brass, etc.
I did and do have a WHACK of highend lighter .458" bullets, as I also had two custom lever .45-70s, now also sold and since I am selling more guns I never use and have lost interest in, I will sell these as well. I have Alaskan Bullet Works 400gr. Kodiak Bonded Bullets and Swift A-Frames in two sizes, 400 and 450 and also a lot of AA-2230, the best powder for the .458WM.
I would give you a very decent deal on ALL of this and you can then have a lifetime's supply of bullets and also lighter recoil, with plenty of "thunp" for anything here in B.C.
I shot my Browning from the bench with a 2.5Leupy and 400s, it was about like my .375s and it makes a BIG hole, no problem with "kick". 500 grs. are MUCH worse and I am not "recoil shy", but, won't shoot them from the bench, now.