I just acquired a new 111 in 270 Winchester. Midway, USA has Shaw barrel kits in 35 Whelen and I want to switch out my 270 to the Whelen. My 111 has a smooth barrel nut and the Shaw kits come with a wrench for the grooved nuts. How do I remove the smooth barrel nut that's now on my rifle and should I order a grooved nut to replace my smooth one???