When Holland made the normal Paradox 2.5", it weighed about 7.6 pounds. When they nade their magnum paradox 2.75", it weighed about 8.5 lbs.
Westley made the 2.5" Explora at under 8 and the Super magnun Explora 2 3/4" at about 8.5.

Loading for the heavy ones is challenging.... Velocities were in the 1250 - 1450 range.