An update on my barrel bulge.
I went and saw Vincent at Ritchies Gunsmith.
He says it's "fixable".
There will still be a slight ripple inside the rifling, the POI will most likely be off a bit.
The example he gave was a CZ 75 he did.
He said the guys groupings at 25m went from 2 inches to 7 inches.
There won't be any safety concerns.
I can live with all that.