1100Z Barra 1100z Gen II Poor accuracy @ 50yds

[Tackleberry]

I wanted to ask other shooters about the 1100z Gen II accuracy. I am getting very nice groups at 25 yds with JSB MKII 33.95 grains pellets. But at 50yds it opens up like a shotgun. Could it be the barrel? I have been checking pellets skirts and wind. All of the mounting screw were tight. These targets were shot for group, not score. I have to say I do like this gun, nice finish, smooth side leaver, great fill pressure, and regulated. All of the things I wish my Benjamin Marauder Gen II had on it years ago.
For its price tag it is a great 25 yard gun. I have attached two photos of targets.

Outdoor range, with no wind.

Thanks for looking

 

[BBGunn]

Looks like those pellets might be too heavy for the 1100z . The best shooting pellet for both of my .25s was the JTS 29.63 or AEA 29.50. At any rate, before you do anything else I would try some pellets in the 25gr to 29gr range.

 

[Tackleberry]

Thank you for your input, I’ll pick up a tin of some lighter weight ones