So I have collected around 350 empty shells from shooting my g22. Now I dont reload, nor will I claim to know how or know anything about it. So this maybe a dumb question, please forgive me. My uncle has about 4 dillon presses lined up. with 9mm, .40, and .45ACP, and .45 long colt. He offered to load them for me as long as I came by to help and learn how its done. Apparently the dillons are all automatic so I imagine this to be easy.

Anyway, is it possible to get a 200 grain bullet for the .40?
And if, so is it a good idea?
Does it hit harder?
It must be a slower moving bullet with less room for powder in there right?

It is possible to get a 200 grain, bullet. To answer your question does it hit harder, depends on the load recipe. The bullet weight doesn't necessarily effect the load. There is enough excess space in the casing for powder that the bullet size isn't an issue. A good reloading manual will spell out the load data for that round. In theory a heavier bullet does carry more energy if the fps is sufficient. To figure FPE, foot pounds of energy the math is: fps x fps x bullet grain weight / a constant number representing gravity of 450240. A load that maintains the same fps with a heavier bullet will hit harder.

Thanks tacworld! This stuff seems pretty in depth. Glad im not flying blind on this.

^ What he said!