I have a Gamo Mach 1 Whisper Fusion with the IGT gas piston. These are my recommendations based on what I have learned from shooting mine for two years and sending over 20,000 pellets down the barrel. Get rid of the scope and get an air gun rated scope with an adjustable objective. The adjustable objective can be used as a rangefinder when hunting as well as removing parallax. If you shoot closer ranges over the winter indoors an AO is a must. Keep the lock up parts well lubed with a silicone oil or grease and when locking up do not slam the barrel closed but close it fully by hand and make sure it is tight. If the lock up plunger is hanging up in any way there will be play in the barrel breech fit. Crosman Premier 14.3 gr. pellets are not what you shoot out of this rifle at 50 yards expecting good groups even after you are experienced. The weight varies as well as head size and they are not round. While they shoot pretty well out of my Mrod with a choked barrel there will be many fliers out a Gamo break barrel. That being said they are excellent to learn how to shoot a break barrel at a much closer range. I actually measured many thousand cphp with a dial calipers and shot pellets 5.5mm and up through the Gamo and the smaller through the Mrod. I tried H and N FTT 5.53mm head size and they shot very accurately but leaded the barrel quickly. The pellet that shoots best in mine is the JSB 14.3 gr. At 13 yards 5 shots make a hole about 3/8" in dia. and 3/4" at 32 yds. I honestly have never tried groups at 50 yards. I also lube my pellets with 1 drop in a tin with 25 pellets and just roll them in the tin. I use bicycle chain lube that I get at Walmart. It is about $5 a bottle and is called WHITE LIGHTNING and is the stuff for dry chains. You will have to find what hold works for you but I use an artillery hold. It is mandatory to place your hand at the same spot on the rifle every time. I NEVER shoot the gun off directly of a rest. The gun is in my hand and my hand goes against the rest. For a rest I use a camera tripod that I fitted with a yoke to accept the back of my hand comfortably. These guns are super hold sensitive so I suggest you start by holding the gun differently for various shots and see how the poi changes. You do not have an easy challenge ahead of you but if and when you get to the point that you can pick up your rifle and put the first shot exactly where you are aiming you will know why so many guys that have Pcp air rifles still pick up their break barrel when ever they can.
