I had JES rebore a Kimber Montana from 270 to 338-06 and cut the barrel down to 21".

It shoots 225 accubonds around 1.5"at 2690 fps.
250 grain A frames at 1.5" at 2500 fps.
210 Sciroccos at .75" at 2800 fps.

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Also the one on top is a Kimber Montana that JES rebored from a .308 to a .358 win.