I had my Avenge X 25 out today for some testing at 50 yards. That turned out to be one of those some good; some bad stories.
When I got back home, I filled the gun up and hooked up the chrony. I was using my Apolo cheap 25 grain pellets. I wanted to see just how the regulator was performing over a full shot string. Here is what that looked like.
Number one is that the regulator seems, to me, to not be doing a very good job of regulating. Granted, the taper off is kind of small but I'd expect to see a much straighter line up to the fall off point. But that isn't the interesting thing. Look at the velocity staying relatively constant while the regulator pressure is dropping. So I then plotted the FPS/Reg P and got this.
This is showing graphically that I'm getting more velocity at lower reg pressures. I'm wondering what this means. It looks to me like if I back the hammer spring off a bit, that the tilt in this graph may be turned into a straighter line. It almost looks like at the higher pressures I'm hitting valve lock with the current hammer spring setting and as the pressure drops, the valve lock eases up so I get the same kind of velocity. Isn't that what an unregulated gun does? That stupid low SD on this data is telling me that there is an extremely strong interplay here between the pressure and the speed. Any data that plots a line like this with relatively equal excursions at the front and back end with a fairly straight connection between the two will give a very low SD.
Is there anything in this that would point to whether or not a system is in a nice state of balance in terms of pressure and valve operation? Any opinions on the performance of the regulator? I should also mention that 2 days ago with the same pellet and the same reg set point, the speed was averaging 905 FPS and I had a smaller SD on the velocity that I see here. Why this would change is unknown to me. If this sounds like the ramblings of a confused man, it should, I am a confused man at this point.
Tony
When I got back home, I filled the gun up and hooked up the chrony. I was using my Apolo cheap 25 grain pellets. I wanted to see just how the regulator was performing over a full shot string. Here is what that looked like.
Number one is that the regulator seems, to me, to not be doing a very good job of regulating. Granted, the taper off is kind of small but I'd expect to see a much straighter line up to the fall off point. But that isn't the interesting thing. Look at the velocity staying relatively constant while the regulator pressure is dropping. So I then plotted the FPS/Reg P and got this.
This is showing graphically that I'm getting more velocity at lower reg pressures. I'm wondering what this means. It looks to me like if I back the hammer spring off a bit, that the tilt in this graph may be turned into a straighter line. It almost looks like at the higher pressures I'm hitting valve lock with the current hammer spring setting and as the pressure drops, the valve lock eases up so I get the same kind of velocity. Isn't that what an unregulated gun does? That stupid low SD on this data is telling me that there is an extremely strong interplay here between the pressure and the speed. Any data that plots a line like this with relatively equal excursions at the front and back end with a fairly straight connection between the two will give a very low SD.
Is there anything in this that would point to whether or not a system is in a nice state of balance in terms of pressure and valve operation? Any opinions on the performance of the regulator? I should also mention that 2 days ago with the same pellet and the same reg set point, the speed was averaging 905 FPS and I had a smaller SD on the velocity that I see here. Why this would change is unknown to me. If this sounds like the ramblings of a confused man, it should, I am a confused man at this point.
Tony
