Nope............, DEFINATELY the bolt head fouling the rear of the breeching ring. Just chamfer the top right hand edge of the bolt head, sufficient for the bolthead to cam its own way down so that it slips INTO the breeching up ring instead of tending to abutt against it.

Not an approved method of repair so far as I can ascertain but if this was one of ours, we'd have gauged and tested it with a slave 'gauge' bolt that the examiner would have had and then certified it ZF............ the death knell for all weapons

But if you can make yours serviceable with a small chamfer, then go ahead