The insurance is the thing these days, Thats one reason a RFD friend decided to not to entertain full bore rifles anymore,, they can have all the proof marks under the sun, but you don't know what Joe public has been loading his hand loads up to, I know a few who have crossed the safety margin many times....... up to a point and often seen on the range with a mallet trying to get the bolt open.........

Even Public Liability insurance won't cover you , its Product Liability is what is required.........