Thread: Bullet seating depth

Originally Posted by Brycey

Guys I am seating bullets in for my trail boss 7mm 08 sub sonic rounds. Using the vivid method. Can't see scratches from lands no matter how far out the projectile is seated etc. aiming to get 1/8 of a turn out from lands so they are not touching when chambered. Any tips on how I could do this easier????? Or is Sharpie ink not the right stuff to use?

If you have no gear,

Try and polish the bullet with scotch bright so that the polishing marks run vertically along the length of the bullet.

You will find the horizontal lines from the lands will show up far easier. Vivid is not the best method.

When you rotate the case you will see the small lines from the rifling on the bullet. Keep re polishing and seating deeper until the lines no longer appear and that is your just touch. It's a gentle operation a little bit at a time.

At the very least you will need to be ale to accurately measure the base of the case to the bullet ogive in order to be able to replicate the seating depth and set your seating die correctly.

You will be able to fine tune it over time by loading a few dummy rounds with fully seated projectiles and then check the seating depth again using your scotch brite polish method. After a few your die will be set and you will be ready to rock!