PC'd Gould HP in .45-70?

[Gray Fox]

I'm planning on sticking my toe in the PC pool and am wondering if it is reasonable to PC the Gould 330 grain HP .45-70 boolit and push it to the 1,600 fps range with the coating intact? I plan to use Larry Gibson's recipe of 5# WW/5# pure lead and 2% tin from 50/50 solder. The rifle is a new Marlin guide gun stainless big lever with a pristine Ballard rifling bore and it likes tumble lubed .460 boolits. If that velocity is not realistic, what is? Any experience or comments will be appreciated. GF

[Walks]

I've driven that bullet out of a 1895CB cast of 20/1, lubed with 50/50-beeswax/bear fat over what is now a over maximum charge of IMR3031.
For LOG-CUTTING Side Matches in COWBOY ACTION SHOOTING. 3 shots blew a 6" x 6" pine upright in half at 50yrds. No one was more shocked than me. No leading, sized .459, it was an OLD small block mold.
Wish I still had some bear fat. Sadly I'll never get a chance to try it on Bear or Boar.

Found one bullet during testing, expanded to 65 caliber.
Didn't have access to a chony. But by LYMAN Book #48, I figure, velocity was 1800fps plus.

I'm still trying to find a SalvationArmy/Goodwill toaster oven. May just have to break down and buy a new one.
Already have two colours/brands of PC.

[244ack]

Been coating and shooting the 330 gould boolit at 1700 fps with no issues in a new 1885 win.
This has been the most accurate load in this rifle
Shot straight ww and 50/50 and both shoot fine
Using aa5744 and imr 3031 and dacron filler.
Going to try some 50/50 water quenched in the next few days and see how that works