I take it you mean the 300 Win mag? The Encore is a great firearm and I believe you will truly be happy with it, however, I've heard of too many problems with the people that have tried to chamber it in a Short Mag.

The only other caveat is that the encore are pretty light and the recoil in a magnum is pretty heavy. The accuracy is very good on mine, however it took a little while to find a load that it really likes, I don't mean it to be a benchrest gun, but it'll hang with any break open single shot made, and outshoot a good many of bolt actions.

Gordon