This is similar to a question by diesel tech, although I do not have a gauge to check the chamber depth. I am loading 75gr hornady bt/vmax bullets. I used a dummy sized case and enlarged it a bit, left it long and chambered it letting the bullet hit the lands and seat. It did this with no tension on the bolt.

OAL is 2.42" but it is seated so little, there could be run-out, loading data says use 2.25" oal. I'm wondering if I can drop the depth 0.10" off the 2.42" and go with that to start load development, or should I run it on in? These are long narrow shouldered bullets so i'm concerned about seating against the lands.