I was going thru my reloading manuals and I found that Barnes and Nosler each tell you how far away to set the bullet from the rifling but the Hornady books don't. I was going to follow the same set back that I see in the Nosler which is .030. Does anyone know of a different lenght for the Hornady bullets? If anyone uses Hornady bullets tell me how far they set them off the rifling

Crimp to the cannelure.
And tell "Cool" to fuck off for good measure.

.030 is probably a good place to start but there is "NO SET RULE" for seating depth that applies to any gun or any bullet. Your gun may like a certain bullet set right against the lands and another .150" away from the lands. AND to confuse the issue evern more it might like EITHER setting with the same bullet.
A barrel is like a tuning fork when you shoot it....ANY depth could be the best for a particular bullet and gun. The idea of starting at the cannelure is also a good one.
Only time and experimenting will tell you what your gun likes. I'd say in general most factory ammo is probably .050-.080" away from the lands in most factory rifles and some factory stuff can shoot just as good as our reloads.

When I used the Stoney Point tool to measure the chamber lenght the Cannelure was away from the brass by about .030. I was setting them at the cannelure but it makes the O.A.L. to short. I will set them .030 from the rifling to start for the 139 grain sst. I like the fact that Nosler and Barnes tell you were to start wtih their bullets. How are Seirra bullets I was thinking of trying them in my 7mm-08.

personally I see that as a plus for Hornady as the only one that can tell you how far is your own gun and load.

Kracky said it first...there is no rule.....experimant to find the right place. Hornady can't tell you as he don't know.....and neither does Nosler.