I have a 30 in barrel chambered in 6-300 SWM, but still have not got it Nitrided yet and will not mount it untill I get that done. I do have several wildcats includeing 2 6-284 with a spare barrel ready to put on. I shot out the 1 st barrel on a 224 TTH and had it set back and rechambered and it`s shooting real good again, but these are barrel burners and I will not put on another barrel untill I have tried Nitriding. If your goin to put together a Hotrod, get a barrel with a very fast twist and shoot the highest BC, heavy, bullet you can find. Lite bullet just drift to much in the wind.