I recently had to clean out the seating die in my Pacific (Hornady) carbide 3-die set because I was getting an ugly crimp. When I pulled the die apart I found harden bullet lube in the die. I cleaned it out but I was in the dance of getting a proper crimp, and the correct OAL.
I pulled out a Bullet Seating-Crimp die from a Lyman standard set and adjusted it to do the roll crimp, while the Pacific die is doing the bullet seating duties. If I did not have the extra set I would have purchased a Lee Factory Crimp Die. BUT a 4th die is not an answer to your problem which is occurring in the bullet seating process. A fourth die is not essential to loading pistol ammunition serves a purpose.
I am thinking that you need a very shallow bell to start the bullet. If the bullet you are using has a tapered heel that will assist in getting the bullet started. Bellow the bell the inside diameter should be at least .002-.003 less than the diameter of the bullet to provide tension on the bullet. The body tension along with a good crimp will retain the bullet in the case under recoil, and assist in proper ignition. I believe a large bell is counterproductive.
From your post I gather these are all new cases and should be the same length, but have you measured them? The die should be set to create a roll crimp in the crimp groove on the Laser Cast bullet. If the crimp is not being created in the groove you have an issue.
I normally clean new dies before setting them up.
Have you measured the diameter of the bullets? I believe they Laser cast bullets should be .431and the inside of the case below the bell should be approximately.4295 according to an old Sierra Manual.
I believe that Glanceblamm loads the 44 Magnum, he is a very detailed type guy.
I can appreciate your frustration.