I been loading for a long time but haven’t run across this before. The rifle is a Ruger American Predator 6mm Creedmoor.
To determine bullet seating depth I do like a lot of folks, using a Stoney Point gauge, insert bullet in the modified case, slide into chamber, move bullet forward until it touches the lands and start adjusting COAL from there.
What I’ve run into is what I think is a tight throat. After inserting the modified case into the chamber and start to move the bullet forward, I feel substantial resistance after only a few thousandths then I can push it on in to a hard stop which is I assume to be the lands.
Is there anyway to determine if the throat is undersized?
