The 375 rum looks rather discontinued to me. I'm sure rem will put out the semi-custom rifles
in this cal. for years, but they aren't putting out the regular ones out in it or the 7rum anymore. I have a 375h&h and it is great, but you aren't going to use that cal for long range at either rifles balistics. You gain 200 fps from the 375h&h to the U, but your recoil goes up a lot for those 200 fps. It still is a 300 yard or less round so go with the h&h, as you can find ammo for it anywhere.