NP XL1100 Finally done with upgrades.

[Rumptis]

Well my np xl1100 is done I have genes bushing and washer kit in, the gun actually only one of the factory plastic pivot washer in it the other it appeared was never installed, also a new piston seal and gtr III trigger. Then I had to find the right pellet and well it was not anything I have heard anyone on here say shoots good in their np xl1100 its the JSB jumbo exact RS 13.43gr pellets I tried jsb 18.1's kodiak 21's and a few others I cannot remember but the 13.43's where the ticket. I am still learning to shoot with the artillery hold since this is my first pellet guns since my 10 pump I had when I was 9 years old but if I do my part I can group the size of a dime at 15 yards. The pellets my brother gave me what he had left of them and I am down to about 20-30 I ordered 3 tins along with some 15.9gr jsb to try from pyramid but they say the 13.43gr pellets are out of stock and will not be in till 05/06/13 so it looks like I have to make these last for another three weeks. I love this gun now I just need to adjust the trigger some although that is kind of a daunting task I have never messed much with triggers so anyone with experience with the CDT GRT III trigger any advice would be much appreciated. I also wonder if my altitude could affect the fps, I am at about 4200ft above sea level as is my brother where he just moved to from indiana that is about 400-450 or something. In Indiana his .177 rws 34 could shoot light wight pellets and they would break the sound barrier but they wont here so it makes me wonder how much fps I am losing over what some of you may get at lower altitude.

[Mpac]

Don't know much about the fps and altitude but shouldn't lose that much.How does it shoot compared to stock form and go to walmart and get some Crosman Premier Hallow points till your other ammo gets here that way you will have some break in time on your gun I"m using AirArms 18 grain in mine right now just got them in and working great in my XL1100 I have all the mods you have in mine except the trigger learned how to use mine.It made a big difference in my XL1100 with the bushing washer kit and new seal.