I have 2 custm rifles; Both have Douglas barrels. One is 26" and measures .710 @ the muzzle, and I beleive it is a #5. The other is 28" and measures .830 @ the muzzle (don't know the contour #). On my 3rd build I want to split the difference in barrel diameter. My gunsmith uses - Broughton, Kreiger, & Bartlein barrels only, and I'm not sure which contour # Im wanting. From what I've seen out there, the Rem Sendero factory barrel looks to be in between the two I have. What size is it? A #6 maybe. I'm thinking something along the lines of around .750. Note: This will not be a "straight taper" barrel.