Well there ya have it, ^^^ they both got the jump on me while I was clearing out a drain.
I have the single pin like the Lyman Devastator and I also have the MP. I find the MP's MUCH more gratifying to use.
With any of them keeping the pins hot is the key to getting good HP's. The Lyman you have to put the pin in the bottom, then pour then pull then reinsert it after dumping the bullet. WHile it can be done these type molds are usually one cavity and make for slow going if your looking for production.
The Cramer style and variations will allow production if you have everything up to temp. There are things which will get in your way however like the sticking pin on GP100's which will cause you to cut a session short.
On that pin GP is it on a MP mold? If so have you tried loosening both pins up just a touch so they have a little wiggle room? If not you might give that a try, it has worked wonders on a couple of mine that were a bit out of line.
Swampman you also have to have your alloy right as well. If the bullets are high in antimony they will be brittle and shatter, to soft they will blow up. Sort of like the porridge, you want it to be just right. That isn't a huge deal as there are several ways to get where your wanting to be with them. Some use a 10-1, 16-1, 20-1, and so on depending on what they are shooting them out of, the diameter of the cavity, and the velocity that they are shot at. All things that have to be considered rather than just pouring up straight WW's and sizing to fit.