tokguy: No argument here. The .45 Colt is a potent and versatile hunting round. Personally, I still think it's best suited as a black powder cartridge. Which is mostly how I load it. But certainly performs well with smokeless powders. I do disagree with you on the .38 Special, though. Not all that useful as a hunting round....except for small game. But, as a plinker and target round, it's hard to beat.....at least in my opinion.
Al
44 mag is legal to hunt with in Sask, 357 mag is not. Incidentally, neither is 45 Colt(WTF), 44-40, 44 sp, the list goes on. Not sure who the genius was that came up with that.
The answer lies within the question. Better to have a .44 magnum you can get than it is a .357 you can only wish for.
They would have used SAMMI info to determine the energy levels. 45lc loaded to SAMMI pressures are kind of anemic. 45lc loaded to Ruger, Freedom Arms & T/C Only loads are a different matter.
If you are looking for a good comparison between ballistics of .44 and .357 mag, have a look at this video from Lucky Gunner.
https://youtu.be/H8SHPYTdPh0
Personally I prefer the .357mag for range work and hunting up to about 100m. As had been said before, shot placement and working within its range limitations is key for either round.
Get one of each; then no argument!
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NAA.
My thoughts are get the 357 for plinking, it's cheaper to feed and use your 45/70 for hunting.
If you wanted it primarily for hunting or woods carry then I'd go for a 45 Colt if you reload, otherwise 44 mag. In your case you have the big game chambering already so grab the 357 and enjoy the cost savings while shooting.