Lucked into a real steal on a custom 300wsm by a really great builder. I have never had any dealing with the 300wsm. I was excited about the buy...thinking a little rechamber job and I got a heck of a eteal on a 300UM. Ididnt even think about the fact that this gun may be built on a short action. I bought the gun saturday morning and had it my possession about 3 minutes, didnt even really look at it. Now I am on vacation and the gun is back home in the safe. I cant say for sure that the gun is built on a short action...but if it is, am I stuck with the wsm?