When you take the shot that will make you champion the barrel will drop out. Works every time
Ain't it the truth.
I always use a generous coating of paste wax in place of the release agent Brownell's sends. Even that won't help if you managed to glass in a feature that allows a 'rivet' or 'dovetail' of glass to form somewhere that holds the barrel in place. Did you perhaps get some on a pin lug (forming an epoxy pin)? You might be able to snap it out with a sharp smack from a rubber mallet - or snap the stock just as easily. :curse: I've only bedded one M/L, and that was my first (and last) kit that I got overly enthuiastic with a gouge at the plug shoulder.
With breechloading bolt actions and single shots I only ever bed the action and one nickle sized spot just ahead of that if there is a barrel bolt with clay dams everywhere. I've bedded enough boat and model airplane hardware in epoxy to know that it gets everywhere, want it to or not.