Unusual seating depth question 17 hornet

[Dink]

In trying to seat my 20 gn bullet in my 17 hornet cases so I am .01" off lands. My concern is that my bullet would only be seated into the case .08". Thats not very much case touching bullet. Does anyone know if there is a formula or rule of thumb as to what a minimal amount of contact between case and bullet should be?

[m12lrs]

Rule of thumb. One bullet diameter.

Of.course rules are made to be broken

[Dink]

Yup, think I'l break this one and chamber carefully, thanks