Is there an agreed-upon opinion about the minimum distance that the bullet should protrude down into the case neck? I ask because I've discovered that the new-to-me Sako 6 PPC I'm loading for seems to have a long throat, and to seat the bullets I want to use so that they touch the lands (68-gr. Bart's and 68-gr. Watsons) puts the bullets out so far as to give me less-than-usual bullet/neck contact (less than half the length of the neck). Of course, I could seat them deeper, but this would introduce a certain amount of jump, which I'd like to avoid if possible.
With the Bart’s touching the lands, the base of the bullet is .121" down the neck. The Watsons end up about .140" down the neck. I don't plan to work rounds through the magazine, so getting the OAL to work through the mag is unnecessary. I'm using the Wilson chamber-type straight-line seater (and the Wilson chamber-type neck sizer as well). I’m wondering whether this amount of contact (like the .121” with the Bart’s) will produce enough tension and I’m concerned about creating excessive run-out.
Any insights on this?