The US sport/civilian/police sniper community have disliked the Remington 700 detachable magazine in .308 for many years. The short action and tight dimensions mean those magazines are almost too small for properly seated bullets. The clip mechanism is not as positive as what the guys seem to be looking for. Hence the Kwik-Clip conversions, the gunsmithed variations that take an M14 magazine, and the expensive HS Precision detachable mags. Solutions to problems the manufacturer isn't willing to address.
If you are hunting with a vehicle, I agree that a detachable magazine is desirable, but for paper shooting, they are unnecessary.