If that false muzzle is meant to start a groove diameter bullet and engrave the rifling, do you have a leveled bullet starter? They don't seat by popping a push starter with your palm.
I have 2 false-muzzle rifles. Both false muzzles are smooth bored groove diameter deep enough to seat a groove-diameter bullet, either patched or lubed, with your fingers. But both my false muzzles are made to allow the bullet seater guide to slide over the false muzzle, keeping things aligned. Vall didn't show us the starter part of his false muzzle.
