They don't make much sense if you are hunting in the thick rainforests of Oregon, but they shine on the prairie or in an elevated shooting house looking across a beanfield or sendero.
I have no experience with the .240 but know a few people that love them for Pronghorn.
I own an HS Precision Pro2000 in .257 Wby that has accounted for a dozen antelope, 3 trophy mule deer and a fat cow elk. I also scored my longest kill on a trophy whitetail...387 yards Dead right there.
Paying $150 for a Mark V, even 30 years ago is a great story.