NO. I guess if we back up, first you must have the load - shot, wad, powder, the proper height, or close to it. With a 12ga that would be between 3/8 and a 1/2" of the shot to the top of the shell. I just checked my shells - .450 [ top of shot to top of the hull ] and a .055 lip on the crimp. It makes a difference what powder you're using - how dense it is. And just use enough wad pressure to seat it. Don't compress it with a lot of pressure - it'll just want to push back up latter. If the shot is too close to the top of the shell you won't have the enough shell material left over for a proper crimp. It's a learning process that you'll catch on to with a bit of experience. First get the proper height of your column of components [ bit under a 1/2" from the top ] and then work on getting a proper crimp. What are you using - powder, wad, and amount of shot in what shell ?

I sort of figured that, and I never tried, but I figured if I'm making a ton of adjustments it would save time.

I am using the lightest recipe for 28 ga in winches HS hulls from my Lyman book.

Win aa HS shells
Correct Claybuster replacement wad for AA28HS shells
Unique powder 11.5 grains
3/4 oz of shot
Win 209 primers

I just looked - 28ga Win shells. You picked a harder shell to reload than 12ga. I only have Rem 28ga shells, but with them I can't use Rem wads - never had enough room for everything. I use the Claybuster wads for all my gauges - much cheaper. I'm sorry about going on about 12ga, should have looked. With the 28ga you'll want about 3/8" from the shot to the top of the shell. I don't load a lot of 28. Once in awhile for my Spanish double or the wife's O/U. 995 of my loading is for 12ga. The amount os shell left for crimping can be more critical in the smaller gauges - you may have to use a bit of wad pressure for a good crimp. You'll just have to learn withy what you're using, and if it will work. Good luck.

How far is the shot from the top of the shell ?

I know this is a stupid question, but have you called Mec, their staff really tries to help. Just a thought

Y'all are awesome. Special thanks to Paul. It was the cam. I have got it consistently cranking correct profile shells!

Glad you got it working.