I bought my first Krag yesterday from a buddy at the range.  It is an 1898 Rifle.  Serial 308xxx made in 1901 I think.  All wood is in great shape and metal is good, but someone park'd it.  My problem is the bore.  I want to shoot cast bullets, but the bore is really rough.  CMP has barrels, but state that they are setup for the "old Sights."  My rifle has a brazed on front sight and a 1902 rear sight.  Can I use the CMP barrel?  If so, what kind of rework will be needed?  Thanks for the help. 8-)