Whig wrote on Jun 23^rd, 2020 at 2:30am:

Heck, I would think with a buckled case neck, it could hamper easy bullet seating and make a ring of resistance greater than it should be, like a strong crimp, and create a higher pressure when the bullet is trying to exit with powder pressure building behind it. Also, the bullet may be seated deeper than it should with the shortened neck and create a smaller case volume for the powder and therefore higher pressure. . . Anything wrong with my reasoning? I always like to learn from any erroneous logic!

1. Look at the photo. It's the shoulder that's buckled, not the neck - and the stubby 110-grain bullet's base is nowhere near the shoulder.

2. As long as the die body and seating stem were in the same position as for the other loaded rounds, the bullet will be at the same distance from the base (i.e. same OAL). The buckled shoulder won't cause it to be seated deeper.

If RicK has a caliper handy, it should be easy to find out if his problem cases are longer than the others.