I shot 4 groups the other evening from 50yds with my cz452 and 42gr winnie subs
2 x 10 shot groups about 1 inch
1 x 5 shot group about 0.750 inch
The last 5 shot group was the size of my finger nail with one shot that went a bullets width low..
Very inconsistent..
I am very tempted to try some target ammo like RobinC used to see if the grouping is better..
Not sure they'd be any good for hunting though...