Remington came up with these loser RUM cartridges which just gives the shooter punishing recoil for no real value.
How can you say loser RUM cartridges for no real value? The 7mm RUM and 300 RUM definitely have a place in their intended hunting market! The 338 RUM and 375 RUM don't really have a place here in the "lower 48", but in Alaska or Africa they probably see a lot of use! Winchester doesn't have a 7mm or 300 that will stay with the RUM's, Let look!
140 gr.7mm WSM= 3225 fps - 3233 ft. lbs.
7mm RUM = 3425 fps - 3646 ft. lbs.
RUM + 200 fps & 413 ft.lbs.150 gr.300 WSM = 3300 fps - 3628 ft. lbs.
300 RUM = 3450 fps - 3964 ft. lbs.
RUM + 150 fps & 336 ft. lbs.180 gr.300 WSM = 3010 fps - 3628 ft. lbs.
300 RUM = 3450 fps - 4221 ft. lbs.
RUM + 240 fps & 601 ft. lbs. The RUM's shoot a little flatter and buck the wind a little better then the WSM's do for really long shots. Will the average shooter benefit from this, maybe not, be the fact is the RUM's do out perform the WSM's and the other Win Mags.! Recoil and muzzle blast is the nature of the beast!
The WSMs, do give good value when we consider the rifles and and performance levels available. Basically they've re-packaged combinations that were known to be good in the first place: light rifles and clones of the most popular magnum cartridges.
I'm gonna get a 300 WSM myself. But I wouldn't say the RUM's are losers. I just don't need all that power! My friend shoot a Canadian moose at 280 yards with his 300 WSM. He used 180 gr. Winchester Failsafe ammo. How did it perform, one shot one kill! He also shot a wild boar with it. You want to talk about lighting fast performance! :-D