Okay, I do own a 243 and I do hunt elk and my oppinon on this is DONT DO IT. My dad hunted elk with a 243 for most of his life, but that's because he's a head shooter(its just his thing, ask him) A 243 will not cause good enough penitration(especially with a winter coat) to cause a quick deat. I hate to see animale wounded and die slow or are mamed.
I did see one guy try and use a 243 once, we were walking up a draw and this elk came over the ridge and my dad shot him(30-06 at the time, not a head shot) and droped him. Well, on further inspection the elk had been shot to hell. We counted 6 shots(all body shot) and then this guy came running over to use and said "hey you got my elk, he just would not stop running so I kept shooting
" We gladly let him have it since it was shot up. Now that guy was a crapy shot and only 3 were kill shot, but the 80gr bullet just did not do enough damage to make a quick kill.
Unless you are going to head shoot, which works on cow's, I would say use something bigger for body shot's. I use a 444 marlin(love it
) and my dad now use's a 30-06, AND my uncle uses a 7mm. I do know a guy that uses a 375H&H but I think that over kill. If you really insist on using it, head shot, or get a heavy bullet what will give great, no, out standing penatration. I do think they make 110 or 108gr bullet for 243 Ill have to check. AND IT MUST BE A DAMB GOOD SHOT, you dont want to be like the fool we came across. And honestly being able to shoot tite groups from a bench does not mean a hole lot when hunting, it just means your gun shoots strait, but you must do the reast. And sometimes you dont have time to get a reast, many times I have had to make a quick shot off hand and sometimes moving, but never if I was not totally confident that I could make the shot. Remember you do own it to the animal, dont be "one of those guys"
I hunt in AZ and the elk hear in the southwest can get fricken hug. Skydiver is right, my cow I got last year was 430 dressed out and a good friend of mine got a bull thet what was 6 something dressed out, biggest bull I ever seen. I dont know were you are but I would advise aganst 243, unless you head shoot, I do sometime(not with the 444) I can give you more info on Elk and 243 and stuff if you want it I do reload for it, just PM me, im pritty knowledgable on both. And I really like the 243 so dont think its just because I dont like the round. Thats my 2 cents....or more like 4 or 5 cents