GTA

All Springer/NP/PCP Air Gun Discussion General => Machine Shop Talk & AG Parts Machining => Engineering- Research & Development => Topic started by: Trim Tab on November 05, 2015, 10:40:50 PM

Title: 953 different trigger mod
Post by: Trim Tab on November 05, 2015, 10:40:50 PM
I brazed some steel on top of the sear tang that makes trigger contact and with some fine tuning (grinding) eliminating all creep.
I'm aware of the adjustment screw approach, I just had to do something different.  At this time filled the piston, I don't quite understand yet how to open the port and polish, that's for next time.

       5 shots before mod   RWS Superpoint 8.2gr .1760                      FPS  417.8 avg, 422 high, 409 low
                                                                                                            FPE     2.7 avg,   2.8 high,  2.6 low
         
       5 shots after mod     RWS Superpoint  8.2gr .1760                      FPS  480.2 avg   483 high, 474 low
                                                                                                            FPE    3.58 avg    3.6 high,  3.5 low

       5 shots after mod    RWS Meister. Pro. Line Pistol  7.0gr .1760    FPS     524 avg    530 high, 516 low
                                                                                                            FPE    4.26 avg     4.4 high, 4.1  low

       5 shots after mod    RWS Diabolo Basic Line           7.0gr .1760   FPS     535 avg.    540 high, 532 low
                                                                                                            FPE    4.46 avg.     4.5 high,  4.4 low