Quote Originally Posted by Dennis
Use a seating die that produces low runout.
Squirrel, and your favorite die is?

Pat, again, thanks for the great info

Squirrel, thank you as well!
Unfortunately that can sometimes be a try-it-and-see proposition. Of course it may be as simple as playing around with a seater you already have.

But for a good balance of quality and price, the Forster Bench Rest seater is pretty good, and as long as you get the standard version it's not that expensive. The micrometer version is nice for convenience, but it adds a huge cost just for the sake of adjusting easily.

Most any seater can be made to work with a little tinkering though. Sometimes it's as simple as playing with slight adjustments of the seating stem and lock nut. Or with Lee seaters sometimes the top of the seater stem isn't ground perfectly which twists it slightly as pressure is applied. If you're dedicated to one bullet for a certain caliber or don't mind buying a few extra seating plugs/stems, you can remove the seater plug and use a bedding compound to fit it precisely to the bullet you're using. The trick is setting it up so everything is held straight while the compound dries. Also, remember to leave a hole for the very tip of the bullet which varies more in length than the rest of the bullet.

I have no idea where I found it, but a few years ago there was a pretty good article on the 'net about adjusting standard seaters to get lower runout numbers, so you might want to check around and see if you can find it.