If it were my gun I would order a throating reamer from Dave Manson and cut a leade like it should have had to begin with. The reamer specs might be 0.3125" x 0.304" x 3°, depending on the gun.
If you insist on shooting with the SAAMI throat, understand that a full diameter ogive will not chamber. Ditto for Keith bullets with long front bands.
The usual solutions apply -- either a reduced diameter front band, or else a 0.050" long front band that steps down to bore diameter. Two examples are shown.
