Thursday I got the trigger from Charlie and Friday I got the breech seal and spacers from Crosman. Well, you know how it is; I couldn’t wait and went right after the breech seal. The factory seal was kind of a bugger to get out. It seemed like just when I had it out, I’d loose my hold and it’d pop back in to place. Fortunately, I did not damage the seal and it looked in real good shape so I re-used the stock seal. The seal Crosman sent me is a whitish color, where as the stock one is more yellow colored. Both are made from a pretty firm material. There were no spacers behind the seal on my gun. The spacer did not fit over the end of the breech, it was too small. So I cut through one side and got it over the breech. I re-installed the seal and it looked to me like it raised it up enough, so I did not install the second spacer. I went right to the chronograph to check the numbers out.
Used the same Kodiak pellets I used for the previous velocity testing. The previous velocity averaged 666.2 with a SD of 6.01. The new velocity averaged 689.4 with a SD of 1.34! Here are the 5 shots in order (690, 688,690,691,688 ) indoors with a lighting unit on the chrony @ 4700 ft above sea level. Those numbers impressed the heck out of me. I have seen very few stock rifles with that consistent of numbers. It did pick up 20 fps which was cool, too. I decided, after seeing those numbers, not to install the 2nd shim or open up the rifle for cleaning. I believe the piston seal is just fine and I doubt I’d do any good. I’m sure with more shooting the last of the oil will burn off.
Charlie’s trigger install went without a hitch and I cleaned the underside of the rifle, de-greased the stock screws, loctited them put it all back together and let it dry.
I’m just going to concentrate on finding the most accurate pellet and hold technique and shoot the heck out it.
Here’s a picture of the parts Crosman sent.
Nathan
