It sounds like you need some good coaching and some training. If you can't shoot a double action/single action pistol I'm going to guess it's the longer heavier DA pull that is getting to you.I Had several USP 40,9mm 45 even bought a tactical 45 could not shoot any of them worth a damn. Bought Glocks fixed the problem. Is the new p30 and HK45 really different and can the trigger be lightened to say 3.5 pounds?
I'm curious what you're going to use the guns for. If they're for defensive purposes I'd recommend against mucking about with trigger pull weight, especially if you're doing it yourself.I do agree practice practice practice but grip fit and trigger do have effect on how well a shooter can shoot. I shoot my p9s very well and even shoot my p7 better than a USP. My question was, what is the trigger like on the P30 and can it be user lightened?