Diablo action... 1 lb 6.8 ounces
Pierce Titanium... 1 lb 10.3 ounces
Basically on the stiffness test, we clamped the front of the receiver in a barrel vise put a dial caliper on the rear bridge and hung 60lbs just behind the indicator.
The Rem 700 flexed .003 of in inch.
The Diablo Phantom flexed .004 of an inch.
The Pierce titanium flexed .008 of an inch.
Pretty impressive for an ultra light.