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?
Sounds to me like your "Modified" piece of brass is grabbing the bullet pretty hard. The bolt is nothing compared to a press for seating bullets and you will encounter some notable friction there. If you can't slide the bullet in and out of the neck by hand its to tight
Trystan
