Have e-mailed weatherby but have not gotten any info. High Desert, the action size is the same for the 270 and the 340. There is a sheet metal block in the magazine box for the shorter 270 cartridge. Additionally, the bolt slot is cut shorter in length for the shorter bolt throw of the 270. Since it is available for the Mark V Dangerous Game and Safari models makes me think it's out there in Weatherby land somewhere. I can't believe the Safari and DGR would have plastic parts, but who am I! GJ