Brap.
If you're considering handloads, look into recipe's with Ramshot Enforcer powder & Unique. If you can locate a source for good hardcast bullets like RCBS's 45-230 CM you can for a fact load standard pressure ACP loads at 1000fps that will feed cleanly in a semi. Unique & Enforcer both have been pressure tested and list charges with that bullet which stay below +P in an ordinary 45ACP, and with a 5" or so barrel, will almost certainly shoot 1000fps.
Unless you go to a Rowland or a super like a few guys are suggesting, a 230gr hardcast with Unique or Enforcer will be the highest performance you'll ever get from a regular plain jane ACP. I'd personally choose 230 hardcasts like that @1000 over any factory 357 load in existence if the decision was just based between 45auto or 357. It's better on bones and thick skin than people believe.
Anyway. Good to read of another ATC holder either way.. the more people who make the effort to qualify, the better it is for everyone in the long run. Shows there is very legitimate, practical purpose for our handguns beyond just punching paper like the general consensus has been for Canadian handguns so long. Geographically speaking by itself, Canada is the last place outdoorsmen of any kind should be shackled so heavily away from reasonable wilderness carry anyway.