I've always preferred light hammers for fast lock time.
But setting off a C/F primer requires force and inertia. Especially the thick cup primers we use.
It's possible that a light hammer might not have enough mass/momentum to force the firing pin deep enough to hit the compound. Might be bouncing off the firing pin.
But setting off a C/F primer requires force and inertia. Especially the thick cup primers we use.
It's possible that a light hammer might not have enough mass/momentum to force the firing pin deep enough to hit the compound. Might be bouncing off the firing pin.

