H&K P7M8 shooting technique?

[Caseless]

I had put 200 rounds through my coworker's P7M8 in the past week. I am still getting pie-plate groups at 10+yards.
One thing I noticed is when I press the trigger, the grip safety also shifts almost imperceptibly. I can't tell where the trigger is going to break, either.
This gun had been worked on by Robar and functions perfectly.
Do I need to take some special GSG9 commando course to shoot this thing accurately?

 

[Tokugawa]

P7's have a sort of smooth long soapy single action pull. Don't expect it to break like a 1911, imagine you are pulling thru the worlds lightest double action. The squeezecocker movement is sort of normal. easing up on the grip helps. Also, the P7 is very muzzle light, not much mass out there to stabilize the gun.

 

[Trebor]

I never could shoot the P7 well past about 7 yards. It's one of the reasons I gave up on that model and sold my P7's. That itch has been thoroughly scratched.

 

[Pilot]

Don't hold the P7 with a death grip. Once you squeeze the cocking mechanism, its very easy to hold back. Relax your grip a little bit and get a feel for what it takes to just hold back the cocking mechanism once its all the way back. When you get a feel for it, tighten your grip to what a normal semi auto takes to shoot accurately. Make sure the gas port in the barrel is not blocked so you can get the maximum use from the gas system and the least felt recoil. They are VERY accurate guns and you should be able to get very small groups at the distance you're shooting.