Thread: bullet and case comparators

For base to ogive, measuring my Stoney Point inserts (now Hornady) -
30 cal = 0.298"
7mm = 0.274"
6.5mm = 0.254"
6mm = 0.233"

I also have a set of Sinclair inserts. They take the measurement slightly further back.
I also have some Redback Precision (Oz) inserts. They measure at a different point again. (They are cut using a chambering throating reamer to more closely match what is inside an actual barrel.)

There are more expensive option available if buying and people will tell you they are superior, but the Hornady or Sinclair inserts work just fine.