Barrel length and FPS?s
- By Ratzy
- Barrels & Muzzle Devices
- 34 Replies
Pellet weight is more a function of initial pressure. Heavier pellet takes more energy to accelerate from rest. That damn Newton and his laws. Continued acceleration takes more energy too but the question still remains at what point does the pressure on the pellet drop below the energy required for acceleration.AT 29 it still pushing the 64gr bullet .. it falls apart after 29 .. will cut one of them to 30.5 just to see where it goes.. I just posted what happened in a test . really was expecting to be supersonic at 33.5 but it didn't.. kept in mind than a 64gr bullet in 22 is almost 3/4" long as long as 85gr . 257 bullet
High starting pressure only gets you part of the way.
These two can give the same FPS/FPE
High pressure no plenum: high initial accel but ceases acceleration soon.
Lower Pressure w plenum: Pellet accelerates for a longer period
You get more shots with the plenum.
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