Just balancing with the hammer spring and pressure..
The external reg is inline between the tank and the rifle..I usually set it about 80% of the rifles max pressure.. Most run the best around there,,
Oh It can be lower, in the single digit.. I have a external regulator, so I tune to the most power and the find a slug it like and lower it with the hammer spring from there to find the tightest group...
The 250 will be just fine for me with a external plenum.. I will stay with it...
20.83 gr
Weather: 53.9°F 7.0mph scattered clouds 991hPa/mbar 29.26inHg 46%
Shot count: 27
Low: 1014 Hi: 1042Avg: 1029 STD Dev: 7 Spread: 28 11/12/25
1:00:49 PM,1030,FPS,49.1,FT Lbs,11/12/25
1:01:07...