Yes - we've all heard about the filed .303 ammo & what drastic things "could" happen. This is for information only, not a slight on your posting.
In one of his books, likely #1, P.O.,Ackley experimented with this very thing and tried to get a bullet to leave the jacket in the barrel. He noted he ended up filing off the entire nose, down to straight shank portion and could not get the Enfield to leave the jacket in the bore. He ended up driving a filed bullet into the bore with a rod, then melting the core out, then firing another round through the rifle. He said nothing untoward happened, other than slight bulge where the jacket was still in the bore, with the round sailing out the muzzle normally.