I have one of his first 50 NULA muzzle loaders on a model 20 action and a 275gr bullet at 2300 fps actually isnt that bad. The standard Timney trigger is outstanding and tolerances are fantastic. The bare stock weighs 1lb.

Mine ready to hunt is right at 7lbs with a sling and scope.
Nosler IIRC uses his actions for testing IIRC too. They are extremely strong for their weight. I would call him too. He nearly always answers the phone.