Who makes a double in 444?
A levergun in the same chambering runs about 7 pounds. Most SxS shotguns run in the 7-7-1/2 pound range. I think it would be very possible to keep a double in that chambering around the same weight. Even if it went as high as 8 pounds that would be ok too, though much more than that and I don't think it would be worth it anymore. Besides, most makers chamber for 308 or 30-06 so why not a 30-30?