Fantastic work so far! I just ordered a 1377 and I want to use it either as a 3 pump pistol or pump it 12 to 15 times and get 3 to 5 shots. With all of the work you have done so far, what is your velocity increase with 3 pumps?Thank you!
Originally posted by Rescue35These numbers are with a 14.5" .22 barrel and flat top piston and valve made by yours truly. The second reading is an additional shot without additional pumping. The shot number corresponds with the number of pumps.1 145.62 248.73 317.84 360.35 398.66 431.37 454.68 485.69 497.610 517.611 53212 553.613 558.3 228.714 565.4 323.615 573.3 365.1 (10.44 fpe & 4.23 fpe respectively)16 563.4 426.117 552.9 Oops...forgot this one and wasn't about to redo it 18 529.1 502.619 511.8 542.920 471.5 555.1 143.1[\quote]