I have found that my new GP100 has pretty "tight" chambers. I'm finding that if I don't use the Lee Factory Crimp Die for handguns, my reloads tend to stick in the chambers, requiring me to tap on the ejector rod to break them free.
I even bought a box of factory ammo for it to test, and they all shot and ejected just fine.
The good thing is that it is apparently going to be a shooter, as long as the nut behind the trigger (me) operates correctly.

It is a pleasure to shoot, though... this was my first target of today, before I started twitching and jerking the trigger...
This was shot at 7 yards, standing, unsupported.