I just got my 300 RUM about 6 or 7 weeks ago, its a very nice rifle. I only own a 30-06 and 300RUM. When you shoot the 30-06 for 3 years and then you hold on to a 300 RUM and blast a shot, for me I noticed a difference in recoil. It nots that bad, but its defenetly not a 30-06.
My 300 RUM is in remington 700 Police edition (comes with heavy barrel, the guns itself without the scope weights about 9 lbs, which help it soak up the recoil bigtime) and I also shoot nothing but 180 gr remington sciroccos. I am not much of a hunter, all my shooting is done in rifle ranges wich 100, 200, and 300 yards. I don't see much difference between my 30-06 and my 300RUM anywhere between 100 and 200 yards, however When I go for the 300, I notice the difference there
My only complain is the cost of ammo, I buy a box for about 33$ (and I think thats a little expensive)