Reply To: .22 JSB Monster 25grain Pellets.
Maxed out at 870fps even after opening up the TP and getting the reg pressure up to 150b.
1″ groups at 25m with these. Higher the velocity, smaller the group gets. 850 and below it kinda sprays.
Not sure how much fps can be increased if the barrel was 24″ instead of 18″. Anyone knows?