I'm working on making a lighter stock for my CZ550 375 H&H (which puts this at about stock number 3 for this rifle ). I'm going to add a piece of ebony to the forend and figured I might as well invest in barrel bedding tool since I've got another stock for a different rifle to do as well. Does someone know what the diameter of the barrel is about 11 inches forward of the front action screw so I can get an appropriately sized barrel bedding tool. Thanks in advance!

About 0.820".
And the muzzle diameter is about 0.670".

Thanks RIP!