I have been on a kick to see what can be done to optimize the Marlin .336 action, and have been looking at various sites and asking about what others have done. One of the best conversions I have read about is re-barreling the 336 to .250 Savage. I would like a light, fast handling carbine in a cartridge suitable for deer and varmints out to 250 yards. The .250 would be ideal. The conversion is a simple re-barrel job, and the taper and length of the cartridge are just about right to function well in a lever action. I hand load, so I could develop the loads that seemed to work best, but since the 336 handles the .307 and .356, even a factory round should not present a pressure problem. Has anyone on this board seen such a conversion? Another good candidate would be a 6.5 MS. The case is longer, but I would be interested in the lighter bullets so OAL would not be a problem. It is a great little round and would be suitable for varmints and deer.