I was less than impressed with the ELD-X on the Caribou I shot. It did the job and dropped it in it's tracks but the amount of bloodshot meat was more than I had ever experienced and the bullet came apart inside the animal. I'll probably use them again because they were 3/4 MOA out of my M70 Extreme .270 Win. Other people seem to like them so maybe my experience was an anomaly.6.5 CM shooting your choice of ELD-X or -M with an impact velocity of >1800 fps gets my vote. My sample size is relatively small (two WT, two elk, a bobcat, a javelina, and a ~100lb pig), but as of today I’m stupidly impressed with that combo. I know a 13 year old girl who's got countless whitetail, an oryx, and several African plains game species with it too and all have been drama-free, as far as I know.
The recoil is laughably tame, I like being able to spot impacts sub-100 yards, I like that I can get a new shooter/hunter behind the gun and know they can handle it, and I can’t argue with the results I’ve had.
View attachment 351058
Elk shoulder exit - through onside shoulder and this hole was with the offside quarter removed. The hole only extended partially into that shoulder.
View attachment 351059
whitetail exit - crunched onside shoulder, exited behind offside shoulder
Good advice. As much as it pains me to say, unless you have a .243 already and are set up to load it with a 1-8 or faster rifle, your best bet is to get a 6 Creedmoor. The 6CM and 6.5CM are what the .243 and .260 would have been designed as if designed today. I've got a .243 with 1-8 barrel, dies, and a decent bit of brass so I'll be sticking with the .243. If my house burnt down tonight, I'd replace it with a 6CM. I'm not sure about your area but the Sportsmans in Fairbanks has had snot loads of 6CM and .243 doesn't even warm the shelf before it's gone.That 300wsm with carefully chosen bullets can do anything in the lower 48 and a lot beyond that, but you already know that...
Since you have a 300wsm, I'd lean towards the lighter end of the spectrum.
6mm something... Creed is nice because of the fast twists readily available.
A 6mm nicely bridges the gap of varmint to medium game. Great for long range target shooting too. Almost no recoil. Great gun for kids and new shooters. Along those same lines, there are some ways to make a .22 caliber a medium game rifle too...