ORIGINAL: cataway
I'm thinking that you should leave it alone there are reasons they do things like free bore , it has to do with presser and it that caliber their is allot of it .wetherbey has a similar configuration in their big bores.
about a year ago i spoke with a gun smith about changing a 300 mag into a 300 Ultra he said no as that they have a tendency to blowup
I think I would be finding another gunsmith. Cause that one is pretty well dead wrong. Pressure is pressure if its in a 22-250 at 60KPSI or a 300RUM. Only reason one might blow up is if they ignore the obvious pressure signs or don't work up a load. And they are not too bright if they do that anyway.