It is possible that they have an extra resize process for the loaded ammo. Likewise, in the industry, it is not uncommon for a manufacturer to keep the best components for use in their own processes; Lesser quality for OEM service parts, and lesser quality yet for private label/off brand third party sales. Sorting for diameter using pneumatic or optical sorting equipment is fast, efficient and cheap.
I did remove the decapping pin from both my .40 and .45 dies, and resized some. It took a lot of force, it took a lot of time (adding an extra process) but the ammo shot fine. At the time I was using an old Lyman Turret press, and it was slow doing the three processes, doing the 4th made it much less appealing.
I have heard that their factory loads are great; I would try a box or two, but I have never seen them at a reasonable price, and few dealers carry them. I have used some Wolfe reloads in .45, and that is really good ammo IMO. But that was before I started reloading.