(make sure you read the later posts, because the reg worked normally on the next tests)
Greetings,
I got my Huma Extra High Pressure reg yesterday, and installed it with no issues at all. Today I had a chance to do some velocity testing, and I was somewhat surprised at the results. The first surprise was the pressure that maxes out velocity. I started at 110 bar and went up to 160 for the 30gr NSA, and 120-150 for the JSB 25.39. Note that this version of the Huma is only supposed to be from 145 bar to 190 bar, but it didn't have any problems regulating down to 110 bar.
I've run this test with the stock regulator before, but it was with 18gr pellets a year ago. According to my notes the speed went up until I hit 140, then dropped slightly at 150. Maybe the curve is just lower with heavier projectiles, but I was surprised to see the max velocity at 120 bar. It clearly seems hammer limited.
The biggest, and most unwelcome surprise was the comparison to the factory regulator. Prior to swapping the regulator, I documented a velocity average of 834 fps for the 30 gr NSA at 150 bar. Now with the Huma I'm only getting 727 fps at 150 bar. Even the max at 120 bar is only 796 fps, so I seem to have lost power with the swap.
Can anyone explain this? Has anyone else done a similar before and after test when receiving the new Huma? The reg holds pressure just fine, but maybe has a different amount of flow compared to the stock reg? I'm just guessing here.
One other thing I noticed is that it's not so easy to bleed off the pressure to run the adjustment screw back in. With the stock reg, you could just start to back out the reg adj with the bottle removed, and it would bleed it all out. You could (maybe not supposed to) fire one shot and that would cause all the pressure to bleed out. The Huma doesn't bleed with a shot, and only one time did I ever get it to bleed some when I backed out the adj screw slightly. I resorted to unscrewing the regulator pressure gauge slowly to remove the pressure.
Thanks,
Rusty (going backwards)
Greetings,
I got my Huma Extra High Pressure reg yesterday, and installed it with no issues at all. Today I had a chance to do some velocity testing, and I was somewhat surprised at the results. The first surprise was the pressure that maxes out velocity. I started at 110 bar and went up to 160 for the 30gr NSA, and 120-150 for the JSB 25.39. Note that this version of the Huma is only supposed to be from 145 bar to 190 bar, but it didn't have any problems regulating down to 110 bar.
I've run this test with the stock regulator before, but it was with 18gr pellets a year ago. According to my notes the speed went up until I hit 140, then dropped slightly at 150. Maybe the curve is just lower with heavier projectiles, but I was surprised to see the max velocity at 120 bar. It clearly seems hammer limited.
The biggest, and most unwelcome surprise was the comparison to the factory regulator. Prior to swapping the regulator, I documented a velocity average of 834 fps for the 30 gr NSA at 150 bar. Now with the Huma I'm only getting 727 fps at 150 bar. Even the max at 120 bar is only 796 fps, so I seem to have lost power with the swap.
Can anyone explain this? Has anyone else done a similar before and after test when receiving the new Huma? The reg holds pressure just fine, but maybe has a different amount of flow compared to the stock reg? I'm just guessing here.
One other thing I noticed is that it's not so easy to bleed off the pressure to run the adjustment screw back in. With the stock reg, you could just start to back out the reg adj with the bottle removed, and it would bleed it all out. You could (maybe not supposed to) fire one shot and that would cause all the pressure to bleed out. The Huma doesn't bleed with a shot, and only one time did I ever get it to bleed some when I backed out the adj screw slightly. I resorted to unscrewing the regulator pressure gauge slowly to remove the pressure.
Thanks,
Rusty (going backwards)