If weight is your number one issue and you're set on Tikka, I'd be looking at 300 WSM. The short action should be a few ounces lighter. I haven't owned a Tikka but know others that have spoken highly about them. I've hunted with a Weatherby Vanguard in 300 Winchester Magnum, harvested 5 elk with, and would be my first choice of caliber and first model other than the Tikka's to take a look at if open to options, although it's likely not the weight of rifle you are looking for. When I'm hunting dark backcountry timber in steep rugged terrain I take my Kimber Mountain Ascent in .308 Winchester. It's a pleasure to carry when in tough country. I've only harvested deer with this rifle. Again, if you're not already set on the Tikka's, my second recommendation is take a look at the Kimber. I'd stay with the short action in 300 WSM. My third option is Savage's 110 Ultralite in 300 WSM. I've only had experience shooting a Savage 111 FCNS in 300 WIN MAG so I don't have first hand shooting experience other than handling the Ultralite at my local gun store. Best of luck on your elk hunt this fall!