Having owned a 7-1/2 pound Belgian double rifle in .405 Winchester, I think you'll find that the heft you describe adds substantially to the pleasure of shooting the rifle. The one I owned hurt, even with a recoil pad. 300 grains at 2250 is nothing to sneeze at.
When last heard from, that rifle was keeping a salmon fishing guide company in Alaska. Apparently some of the furrier fishermen up there object to sharing a stream and need to be reminded of their manners.
It is a tad hefty but only a half # heavier than my TR 1895 chambered in .405.. A glass topper will add more but recoil has never been an issue for me, one just needs to pace themselves because it will bite you later if you get too carried away !
