Some weird happenings today while reloading.

• Check up inside your seating die. You have a buildup of some type material that is pushing the bullet lower. It is common to find a build-up of lube. Better dies are drilled to allow an escape route for excess lube.

Those cartridges are fine to shoot, unless they have a really hot load. However, you probably won't be able to get them to auto-load with the bullet seated that low.

• Those small primer cases are the new thing. They shoot just like the others, but need to be sorted so that you load larger primer all at once, and then small primer. It doesn't work to mix them in the reloading process for obvious reasons! Nothing needs to change but the physical primer.

my guess is that the bullet seating issue is from the bullet not sitting properly in the seater die. it could be getting hung on a burr or lip inside the die.

as for the brass, there are a few makes out there that do the small primer thing (i assume to save money but i dont know. i have reloaded and used a few of them and didnt really notice any differences.

I would not shoot the two that were seated lower. Higher pressures for sure. IMO

I agree with EB1. Don't shoot these.

As for the deep seating, some of the bullets may not have been sized properly, so when you put them into the cases, they may have slid into the case too far. Just thinking out loud.

Shoot'em, but AFTER you do this

Get a kinetic bullet puller. Put the short rounds in it and tap gently until the bullet advances far enough to be set at the proper depth.

If you are really concerned, let it come all the way out and reload it over again (but you don't need to remove the primer).

That's what bullet pullers are for, ain't it?

Lost Sheep

A lot of the seating dies have a seating plug that is loose and free floating inside the die. This is to help center the bullet ogive in the die thereby allowing the bullet to seat in the brass straight. If the gunk/dirt has worked up past the areas you can see the seater plug could hang up and cause the problem you show. Take the die apart and clean it well. You will be amazed with the crud you will find inside.

The small primer brass is often found used on the lead free rounds. It does not make a difference with my reloading other than having to separate them for priming purposes. They all shoot fine.

I don't know how you managed to seat several rounds that much shorter. As said, maybe a lump of wax bullet lube in the die that dropped out unnoticed.

I would not shoot them unless they were loaded so light as to barely function the gun.
They have less powder space than intended and will run to higher chamber pressure. If they are already at or near maximum, that could lead to undesirable effects.

I have used the Lost Sheep Technique and it works.

The small primer pocket cases started out as a design for lead free Non Toxic ammunition. Since these lack the NT headstamp, maybe they are just doing it as a factory economy measure to only use one primer pocket setup. Save a dime a box on manufacturing costs and it will mount up.

Do the deep seated bullets have good neck tension? When using mixed brass, some maybe thinner than others in the case wall thickness. How is bullet diameter? Should be .452" for lead. Have you tried to seat and crimp in a separate step.

I'm guessing economics or the primer shortage forced the mfgs to go with small primers.

As stated above, just separate 'em so you can reload.
You won't have to change the recipe.

Is there any chance they got on top of the shell holder? The length difference looks just about right for that. On second thought may not quite. Frogs idea sounds like a definite possibility.