Here's the original post's salient points:
I am looking at my next firearm purchase...this time I have a yearning for a real elephant killer.
Wow! where do you live?
a 45/70 is probably what I am looking for, but I have been offered a Marlin 336 in .35 for $250, which is a lot cheaper than I have been able to find any 45/70's.
I dont know if I'd consider the 45/70 an elephant killer, although it undoubdtedly has done so somewhere in Africa, at some point in time. If, on the other hand, you expect to have a heavy bore gun in your battery against the need to hunt large and/or dangerous game - well, I can think of another with a bit more versatility. Read on.
I am not really familiar with this caliber (.35 Remington)...Which direction would you go?
I like the .35 Remmy any way you shake it. In fact I like 9MM bores period, so I'm biased.
At $250 for a nice Marlin, though, Id jump on it - just because. However, let's stick to your situation shall we?
I am hopeful that I will be able to move to Alaska in the spring of next year so I am obviously thinking about the big toothy critters. Below are the factors I am considering:
POWER!
Cost of the rifle
Cost of the ammo
Availability of ammo
Well, in AK you should likely be able to find 45/70 ammo pretty regular, as its a popular choice for your needs, and a good chioice for a North American big bore. Without being there, Im certain there're plenty of folks in AK who shoot one, for all the same reasons you named, and do so with aplomb.
If it were me, I'd go a lightly different route. As I said, I am big fan of .35 bores and there is one that fills the bill pretty admirably and isnt too obscure. Of course, Im talking about the .358 Winchester. I'd opt for a BLR in that caliber and go on the scout for ammo. Wanna know how to find ammo for it in AK? Search the Internet for some suppliers up there and then email them or pick up your cell phone and call ahead! Likely its there, considering it's virtues.
No less an authority than Chuck Hawks lists it in the category of desirable medium bore rifles, able to take elk, kudu, moose and bear. Other cartridges in the class include such notables as .338WM, .35 Whelen, .340 Wthby Mag, .350 RemMag and the .375 H&H. Pretty notable company.
Power is present in abundance, but it has better range with flatter trajectories than the 45/70, with it's honking big lead and rainbow trajectory. Consider this a .308 necked out to .358 and loaded to the max. In close, where flat shooting and long range isnt an issue, a powerful, fast handler is in order. The Marlin in 45/70 would do nicely. However, with the .358 Win, you would be prepped for toothy critters about as well as you could be AND have the option of toting the same gun for 200+ yd shots at other large game, like elk and moose. That's versatility, brother.
Neither it nor the 45/70 is going to be a cheap-o shooter, though good ammo, when you need it the most, is worth almost any cost. Besides, if you're using up more than 2-3 boxes a year (40-60 rounds), you should be reloading anyway.
Edit: Or should I just buy a good 30-30 and hope that 6 from it is enough for anything I have to stop?
Your choice, I suppose. Lets face it in AK, large bears are going to be to your main worry (I havent heard of any tigers or Cape Buffalo up there.) SO, If I were going face to face against toothsome critters in the 500+ pound range, like a bear, Id leave my .30-30 at home and take the .358 Win BLR. Or the 45/70. Again, the choice is yours.