GTA
General Discussion To Gateway To Airguns => The Shop => : kirby999 October 16, 2007, 08:31:28 AM
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Last week I emailed J Macarri about a lighter spring that would reduce my TX200HC to around 10.5-11fpe . He suggested a specific spring and seal and I ordered them . They came today in the mail . Quick delivery. After lunch I removed the stock and got out my spring compressor and went to work under the old pine out back. I was familiar with the disassembly this time and didn't even need my instuctions . I removed the end cap/ trigger assembly after removing the stud that holds it in and then the spring wipping the tar from the factory spring . I noticed the new spring is a little bit longer . Some folks say to work on these TX's, you don't need a spring compressor , they may not , I prefer to use mine, especially with the longer spring I found it necessary . I removed the piston and compression tube and pulled the piston out . I cleaned it up and in a few minutes of careful prying , removed the factory seal without any damage . I then installed the new on , lubed the piston with moly paste and started to reassemble everything with a coating of tar on the new spring. I lubed the spring guide and went to install it and it went into the spring about an inch and stopped . Oh no, everything had gone smooth up until then. Well time to do a search . I found a post from a well know tuner who stated the spring guide should be a tight fit to reduce twang . He went on to say the spring when compressed would expand allowing the slightly oversized guide to work. That's all I needed to hear. I lubed the guide and inserted it into the spring , put the end cap / trigger assembly behind it with a block of wood to keep from messing up the finish and started the slow turn of my spring compressor , while keeping everything aligned until the screw hole of the stud that holds everything together lined up . The guide slid right up into the spring about half way through assembly . I finished putting the gun together and couldn't wait to try it out . This gun shot good before, but was a little on the hard side to cock and still had a good bit of recoil . The first time I cocked the rifle , a smile came on my face . I knew I had done right . I sighted it in at 20 yards and shot maybe 50 pellets through her . I think I had maybe one shot that deiseled . This is one sweet shooting rifle now. No twang The cocking is smooth and the force to cock it has been reduced by at least 25% . I shot from 12 yards , out to 35 and had no trouble keeping my shots inside my orange one inch dot. I'll get some numbers latter on this week if the weather permits. kirby
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So when are you gonna start a tuning Biz David? Seems like you got it down pat, that R-7 you did was very impressive.
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No Biz for me , Just making my own stable a little better , one rifle at a time. Anyway I bugger up too many screws to please somebody else, although I am getting better with that too. hehe It'll give me something to play with this winter . That way they'll all be ready next spring, and I won't know which one to pick up and take to a match. . kirby .