Bit of apples and oranges here: the Tolley Ubique is a choke-rifled gun, not a fully rifled gun and fires the Fosbery conical projectile of about 535 grains or so. Chokerifled guns usually weigh in at 7 lbs and 4-8 oz. whereas, the fully rifled arms are much heavier. H&H claimed that its Paradox (Fosbery's original patent) would give the same accuracy as an Express Rifle at 100 yards.
Regards, Tim