[metallicafatcat]

Need to make an intro post.

 

[metallicafatcat]

Because of the HPA System the FPS (~430fps) are the same.
But in my Test the 6.03 by MadBull was more accurate on long range.

But this weekend I will go out and shoot again with the 6.03 by MadBull. When I can still hit at 70m I am sure the 6.03 465mm by Madbull is more Accurate than the 6.05 470mm by PDI.

Maybe the "theory" with the bigger diameter does only work on lower fps?

Go back and re-install everything. That sounds like where your problem is lying.