The most I like the .270wsm.Or making the 6.5X284 factory.
The least I see is the .204.I just cant seem to put my money on it.I know there will be some argue but that is my pick.I also cant see any improvement on the .243wssm over the .243win.

My pick for the most usless is the 204. I have one and love it but it dosnt do anything a 223 cant do just as well.

i like the 17 hmr and the 260 rem. I don't know the age of the .260, but it is gaining ground every year. Great selection of 6.5 bullets in a short action. Not a big fan of the short mags and super short mags. Still using the same bullet, just coming out of a different package. There's a reason why the old .243, .270, 308, 30-06, etc are still very popular. They work!

I think the least useful would be the 17 hmr followed by the 204.
Got no opinion on the most useful, I would say the 7-08 even though its much older, but it really is fairly new, lot of people still dont even know about it, its still gaining popularity.

I just thought of another least. 12 gauge 3.5" shotguns. All it was, was a marketing ploy between the shell makers an gunmakers to sell more products. No advantages what-so-ever in the waterfowl loads, turkey loads are a lil more of an improvement.

I agree. It was part of the bigger is better brain wash job.

338 Federal and 308 Marlin express are the hottest new offering that sounds good, 308 ballistics out of a lever gun sounds really good