If it's a recently manufactured No.1, and not one of the ones throated long for 175's, you may be surprised to find that you won't have to do anything, but stuff ammo into the chamber! If it doesn't shoot well, then JB covered the bases pretty completely. A #1A 7x57 is about as good a do most everything rifle one could ask for. Enjoy it, and good luck....hope it's a shooter!
Jeff
