The 257 wby will surely kill the biggest bulls if hit right, I've used it before using a Nosler 110 gr accubond, and while not my favorite on elk in the right hands and good shot placement it will get the job done @ some fairly longer ranges, a good friend took a very nice 385 bull with a 257 wby @ 400 yds using a Barnes 100 grain ttsx and the bullet blew right thru and exited lung shot. I seen Indians down on the Apache res carrying sks's on elk hunts it wouldn't be my favorite but they use what they own. This last week my son went with friends down the road and they got 2 bulls @ 496 yds 7mm stw. Other friends I just talked to today got 5x6 and 6x6 @ 60 yds with 300 ultra mag. None of them use Bergers. These guy's either guide, own mules, or hard core elk hunters as most of our friends are. I tracked a rag horn bull one time I shot right at dusk the evening before solid hit 270 win 150 grain Nosler Partition ,maybe 60 yds facing me head on. The bull had been in a wallow and the dried mud and small pea gravel and cinders were caked on the front of his chest , when I hit him dead center all I seen was the mud flying and a sharp whack from the bullet impact, we were out pretty much all night tracking that elk with flashlights, I found him about 7 am the next morning laying up under a tree still quite alive but not wanting to stand up , so I finished him off with neck shot. That partition came completely apart from the caked on mud /gravel. Years before I was playing with lesser constructed cup and core bullets and had some rather disappointing results at close range elk 50 /60 yds, perfect shot completely knocked the elk off it's feet , then it got up faster than you can believe, and off to the races we went 800 ft elevation drop down a canyon the last 40 ft was vertical, and it took 2000 ft of 3/16 th's stainless cable and snatch blocks to get to the elk, luckily we had 5 - 1000 ft rolls of cable in the trucks we could if needed clamp together because we knew the area . So my idea is to drop an elk as fast as you can especially when you are in a rough mtn /canyon area. Seems like every year I tell these guy's shoot them till they drop then one of us still gets a phone call , can you guy's come help ! That's why I carry 2 pack frames in the Bronco along with other equipment. I told my kids a long time ago ( they are all adults now ) you shoot that elk down in that deep canyon it better be a 400 class bull because the fun just stopped. My wife broke her ankle a year ago this Nov helping pack my son's bull elk out, after recent surgery it will be another year before she will hopefully be up and running so we will most likely modify our hunting strategy and try to shoot elk closer to easier access.