Marlin Model 336 Extra Range
Q: According to the ninth edition of the Gun Digest Book of Modern Gun Values, Marlin chambered its Model 336 for the .307 and .356 Winchester cartridges from 1983 to 1987. The model was called 336 Extra-Range Carbine. It didn't mention any modifications to the basic Model 336 that were required to handle the increased chamber pressures of the two Winchester rounds. If the action wasn't beefed up, would it
be feasible to rechamber from .30-30 to .307? Or would it be dangerous?
A: In a future Practical Reloading column you will read about a conversion such as you asked about. My friend Ken Harding had a regular Model 336, not a 336ER, rechambered to .307 and it works just fine with both factory ammunition and sensible reloads. However, I believe that Marlin did in fact, beef-up the action of its basic Model 336 to handle the extra pressure just as Winchester changed its Model 94 to handle the extra pressure. I don't think there's any danger just as long as you don't try to equal the ballistics of the .308 Win.