I wont even let a lead sled on my range, not after I seen what can happen. You can bring it, but it wont leave your car, if it does your and your lead sled can leave my property.
Not trying to be a smart allack; but, why gemby? Is there some danger to others around? I've never heard of any such thing; but, I guess there's always a first.
Everything seems hinged on speed, acceleration, deceleration forces. The Lead Sled stops recoil in a MUCH sorter space than ones shoulder. That greatly increases deceleration.
Even airguns with their spring action can damage scopes. Something about the way the spring jerks the scope around.
I got a Lead Sled years back, but haven't used it in the past 5 yrs. or so. If anyone needs one, let me know...
DF