I'm a little puzzled by information I've read regarding seating depth.
Sierra Bullets Tech Newletter Volume 9, No. 3 states:
"It is highly recommended that a bullet be seated so that it has at least one bullet diameter amount of the bearing surface in contact with the neck of the cartridge case. This helps to provide uniform tension as well as to hold the bullet concentric with the case and will help accuracy considerably"
Nosler Reloading Guide #Four, page 35 says: "Set your seating die to seat at a depth between .015 and .030 inches less than your rifle seating depth (this is generally where the best accuracy is found)..."
For target loads where OAL could exceed the interior length of the magazine, I have routinely seated bullets around .015 to .030 off of the rifling, and had good results. If I take Sierra's advice and seat to one bullet diameter, I'd be generally much deeper that.
What are other people's thoughts on this?
Sierra Bullets Tech Newletter Volume 9, No. 3 states:
"It is highly recommended that a bullet be seated so that it has at least one bullet diameter amount of the bearing surface in contact with the neck of the cartridge case. This helps to provide uniform tension as well as to hold the bullet concentric with the case and will help accuracy considerably"
Nosler Reloading Guide #Four, page 35 says: "Set your seating die to seat at a depth between .015 and .030 inches less than your rifle seating depth (this is generally where the best accuracy is found)..."
For target loads where OAL could exceed the interior length of the magazine, I have routinely seated bullets around .015 to .030 off of the rifling, and had good results. If I take Sierra's advice and seat to one bullet diameter, I'd be generally much deeper that.
What are other people's thoughts on this?