Things I liked:I haven't found any damaged or bent pellets. They shot and grouped very well out of my Gamo Silent Cat before the Nitro piston conversion. Also loved the amount you get per can. Things I would have changed:Can't think of anything. What others should know:For the Gamo Silent Cat with spring, these were tied for the best grouping pellet (Crosman Destroyer is the other pellet). Very consistent shot to shot with a spread that was less than an 1" at approx 40 yards.
Things I liked:Very fast turnaround from Pyramyd. I shipped my Gamo Silent Cat on a Tuesday and received it back the following Tuesday. Kudos to them!
The gun finally feels the way that I wish it had right out of the box with this mod. Cocking is smooth and linear. Recoil is a short, not too heavy backwards push. The gun now doesnt vibrate all over the place after you pull the trigger. Also, loving the fact that I can cock and load it then leave it sitting until those pesky squirrels decide to show up to eat in my wifes garden. Things I would have changed:Not sure...yet. I've got maybe 50 pellets through it so far. As of yet, I can say that it is just as loud as it was when the spring was in place just a different sound now. If it doesn't quite down more after another 200 pellets or so then I'm going to try a recommendation to put some sound deadner in the stock.
By the way, I'm not saying it is loud just not as quiet as I would ultimately like it. I can still shoot and plink in the back yard without my neighbors knowing that I am doing so. What others should know:Overall, it is a great conversion.
With that said, I am a little on the fence about one aspect of the conversion though. I cannot tell if FPS has dropped or increased after the conversion. I didn't chrono the gun before I had it converted which I should have.
What I am also wondering is that Gamo and Crosman are advertising guns with the Nitro Piston conversion with many different FPS ratings for guns that are shooting the same caliber. So now I'm wondering where the piston that I received falls in the FPS pecking order.
With all that said, I would still do it again I think.
Things I liked:I was recently shooting a .177 Gamo Silent Cat with a nitro spring. The Gamo was accurate but this thing is a tack driver at twice the distance. The Gamo was powerful but this gun (with a few mods) is just as powerful in a larger caliber (.25). The Gamo wasn't that quiet but with this gun the loudest thing I hear is the pellet smacking the target...INCREDIBLE!!!
Right out of the box the gun is pretty quiet. Not extremely quiet though. You can hear a hammer hitting sound as well as a large pinging sound. You can shoot it in the backyard with neighbors around not have them be alarmed. However, with a few mods that are available and some tweaking and tuning you can make this thing so quiet it is scary. I have mine tuned to the point that the only way you know I have fired it is because you see the plume of gas coming out of the other end and you can hear the pellet hit the target, can't beat that!
The JSB Diablo Exact Kings group in a dime size at 30 yds. The Benjamin Domes also group very well at the same distance. With the power of this gun it doesn't matter because even if you miss your target a bit your still going to blow up whatever your shooting at.
This gun is a squirrel destroyer! I have aimed at at a squirrel and had the pellet hit a full two inches lower (trigger pull, can and will adjust this at some point) and still put the squirrel flat on its back, no follow up shot necessary. Its internals were completely decimated where the pellet hit. Things I would have changed:I wish this gun had (iron)sights. Its almost unfair to have a scope on this gun. I know that the magazine makes this almost impossible, however shooting with sights would really make this gun fun.
Wish PCP entry cost was lower but oh well the amount of fun you get makes up for it. What others should know:Stay away from pellets that are not pointed or domed. Crow Mag's and hollowpoints suck out of this gun. Don't shoot Gamo PBA's either, another waste of dollars as they tumble all over and are LOUD as a small rifle.
Read, read, read as much as you can on this gun. There are so many options and tuning methods that take this from an excellent gun to an out of this world gun.