Re: 308, 243, or 260 rem?
Hunter, ask when they answer to include experiences such as how long they've been shooting, hunting, what kind of shooting or hunting, whether they load, and most importantly, why they feel the choice they vote for is the better one. You'll get a much better answer without absent the chaff.
For example:
Been shooting and much load testing since 1978 from 17hmr to 460 WhyMag (I'm 48 now), shooting Metallic Silhouette, deer hunting in LA and TX, never killed anything over 150lbs, many coyotes, some ducks, dove, rabbits..mostly varmints, crows.
My order of preference of the three are;
243, 260, 308 dictated by exterior ballistics / performance.
A 115 DTAC at 3000 fps the 243 performance superior to the other two, but only slightly better than 260 with a 142 smk at 2950. However, that's merely an illustration since you're interested in hunting and I'm not familiar with hunting bullet performance. I think Berger makes a 115 hunting bullet.
Folks are carried away with barrel life. Five hundred dollars buys a fine hunting barrel and smithing. Second, no rule mandates every round fired must be of full capacity, mach 3 velocity; third, once you wear out a 243 you'll be an accomplished...maybe an expert with your hunting rifle; fourth, how many $500 will you earn in the time taken to wear out a barrel?; five, how many other $500 will we squander on junk during that time? That's ten tanks of gas in my car just to go get an espresso!
Shooting your 243 twenty rounds per range session, which is reasonable if they are 20 deliberate, slow, shots, one weekend per month, which is about all a married man might get to shoot (alter as it might apply), assuming the normal 243 barrel life of 1500 rounds means the time necessary to wear out your 243 will be 20 rounds divided into 1500 equals 75 (months) divided by 12 to get years equals 6.25 years or can be expressed as 6 years and three months.
Check my homework. I'm a lawyer. I don't do math good.
Or you could shoot it three times more frequently or three times more ammo when you do shoot, and still take two years to wear it out.
Guys, please get off that barrel life horse. Its dead, dude.