It's certainly puzzling thats for sure. I also shoot two 45's. One in .177 and one in .22, I have no problems grouping with these springers and I can tell when inaccuracies are pilot error.
My grip is repetitive but I might well be guilty of an overly tight grip at times, so I'll keep that in mind.

I'll also check the end cap. thanks for that.

Some times the 240 will group yet other times the shots are just randomly all over the place some even missing the 14cm target. You would swear blind it's deffo the pistol. It's really bugging me. I even thought about buying another just to compare and rule pilot error or duff pistol out.

Thanks for the tips gents.