I want to update this thread with a big THANK YOU to those of you that gave me guidance on how to shoot air rifles. Despite being and avid hunter, I couldn't hit the broad side of a barn with this Benjamin Titan .22 when I first got it. Here are the items I changed. Now I'm shooting about 1-inch groups at 20-25 yards.
1. Artillery hold
2. Trigger mod
3. Tightened bolts on gun, which I found were fairly loose when I took the stock off for the trigger mod
Also, I'm finding that it shoots different pellets way different.
Crosman Premier Ultra Magnum is zeroed in to 1-inch groups
JSB Match Exact Jumbo Heavy Diabolo shoot 1.0-1.5 inches high and right on the zero for the Crosmans.