Re: Seating depth-powder vs bullet
In my experience, using the same bullet, if the bullet seating depth for one powder is in the lands or under .010, I have seen changes to a new powder sometimes require a change in seating depth to optimize accuracy. Much less so with seating depths that are further out, .025+. This probably has to do with a particular powder's pressure characteristics which become more influential when that bullet is in or very close to the lands. If you change powder and keep the bullet close to, or in the lands it's a good idea to start with a lower charge when changing powders.