What to do about this crown?

[Peter Laidler]

I certainly woiuldn't be lapping the barrel. Don't forget, lapping the barrel is just another or polite way of removing some of the bore material. Additionally it's a good way of rounding the remaining edges of the rifling. The days of lots and lots of gauges are well past. If a snioper rifle passes the EMER accuracy test and the plug bore gauge runs, then the barrel is serviceable