The NOE 503 and the ACE 245. Hard to see here but the ACE has a small reduced diameter area between the transition between ogive and full body diameter and the crimp groove. You can see a hint of a shiny ring where the nose was sized down but it isn't all the way to the crimp groove. Can anyone else see room for lead to move?
The 503, being a typical Keith type bullet, has plenty of lube groove for lead flow.
Here are the 287B after sizing to .429. Right to left the have a taper cut into the nose, a greatly enlarged forward section of crimp groove, and enlarged crimp groove and a small .41 groove in the nose. The groove isn't as ice as I would have liked but it was the tool I had on hand.
None of these are crimped yet. Very easy to feel a difference in seating the .429 and the .431 bullets.
Anyone care to estimate the velocity difference between the bullets based on size? I expect about 25-50 fps reduction with the smaller bullets due to leaking gas before the bullet seals the forcing cone. I hope I doesn't lead!