Originally Posted by Broz
Here's the deal. It is dependant on neck tension. Even though the tip may not bottom out in the plug the contact area where the seating plug contacts the bullet could be a very narrow band. If so, and you are running a lot of neck tension it will make a grove in the bullet while seating them. Many have done this and blamed the bullets for poor performance on game when the actual truth is they damaged the bullet tips while loading them. So, seat one and then do a Ray Charles test for a grove in the bullet where it contacts the plug. If you feel a grove you need a plug with a wider contact area on the bullet.
Jeff, that is true. I have had that happen. But, the "groove" is normally very shallow and more like a scratch around the bullet surface about .050" below the meplat. I have shot them, and found it will not affect accuracy.
The meplat should never touch bottom of the seater plug cup. If it does, call the die manufacturer and they will send you a deeper one. You can check this by putting a tad of Prussion blue on the tip when seating.