Hi Paul and welcome to the BBS, there is a wealth of knowledge here in the pistol section, unfortunatley finding it is the problem.
I won't bombard you with to much info, but being a pistol fan you might want to have a look at and join the Umarex Boys Club. They are a great bunch of guy's and gal's and run some of the best on-line comp's around.
again welcome and enjoy the banter.
Jason