We would think they would sell at least as well, but think of this, they had discontinued the 22-250, some say because of the high percentage of returns on failure to extract, yet apparently demand was high enough, that even with this problem (supposing it was worse than the rest of the chamberings) they brought it back. It would be nice though if they would offer some heavy standard chamberings like the 35 Whelen and 338-06, a few of the blackpowder chamberings would be nice like 40-65 Winchester or 38-72 Winchester, but they don't even support the 32 H&R mag, a cartridge they designed and is even being chambered by Marlin now, so I doubt we sill see NEF/H&R offer anything that is daring or lacks a huge following.
One cannot howver slam them too hard for their position,picking up my trusty Accurate Arms manual I count 6 offferings of 30 caliber magnums, not including the 30 WSM, and rifles chambered in 308 and 30-06 still outsell those 7 chamberings combined and when one gets realistic about it, how often in the real world does a magnum make the difference between bringing home the bacon and waiting till another season? But who wants to be realistic, I want NEF to make a handi in 375 JDJ, a 375 Winchester would suffice.