Avenge X tube version. HN Field Target Trophy pellets at 20 gr. Reg set (I think) at 150B. Transfer port set to LO. Started at full fill of 300B and ended the shot string at 120B.
I have always questioned the regulator in this gun. I only plink at 25 yards in the backyard so no reputation or money is on the line here. When I set the reg, I degas and then slowly bring it up to 150B - that gives me good accuracy with the 25 grain pellets at 910 FPS - and leave it. When I go to shoot, the reg is always at 165B. This drops after the first shot but the regulator pressure is always dropping as I shoot. Today I wanted to see what would happen with the transfer port on low with the lighter weight pellets. 100+ shots were all hitting where aimed but doesn't the graph look like an unregulated gun where the first shots are low because the hammer can't overcome the pressure; then you hit a zone where things kind of flatten out because the drop in pressure gets the hammer happy; and finally the velocity falloff when the speed is just being dictated by the pressure.
With an SD of less than three over 100+ shots I'm not unhappy but it just doesn't seem like the regulator is working great or maybe not at all. Again, all I do is shoot at clay pigeons in the back yard and then keep shooting pieces until I have dust. Over this string every shot was hitting POA consistently so maybe I just shut up and forget about it. Using the HI transfer port setting with the 25 grain pellets I get the same kind of curve with a little higher SD and a 60 shot count before the velocity really starts to drop.
I'm just looking for any opinions. In my mind, regulation means a constant pressure to a fairly high degree at the plenum until the tank pressure gets below the reg setting and the velocity drops. I suppose this could also be some sort of a tuning thing but I've gone over that by adjusting to the knee and backing off a bit and I do see pretty good accuracy with decent SD numbers.
Tony
I have always questioned the regulator in this gun. I only plink at 25 yards in the backyard so no reputation or money is on the line here. When I set the reg, I degas and then slowly bring it up to 150B - that gives me good accuracy with the 25 grain pellets at 910 FPS - and leave it. When I go to shoot, the reg is always at 165B. This drops after the first shot but the regulator pressure is always dropping as I shoot. Today I wanted to see what would happen with the transfer port on low with the lighter weight pellets. 100+ shots were all hitting where aimed but doesn't the graph look like an unregulated gun where the first shots are low because the hammer can't overcome the pressure; then you hit a zone where things kind of flatten out because the drop in pressure gets the hammer happy; and finally the velocity falloff when the speed is just being dictated by the pressure.
With an SD of less than three over 100+ shots I'm not unhappy but it just doesn't seem like the regulator is working great or maybe not at all. Again, all I do is shoot at clay pigeons in the back yard and then keep shooting pieces until I have dust. Over this string every shot was hitting POA consistently so maybe I just shut up and forget about it. Using the HI transfer port setting with the 25 grain pellets I get the same kind of curve with a little higher SD and a 60 shot count before the velocity really starts to drop.
I'm just looking for any opinions. In my mind, regulation means a constant pressure to a fairly high degree at the plenum until the tank pressure gets below the reg setting and the velocity drops. I suppose this could also be some sort of a tuning thing but I've gone over that by adjusting to the knee and backing off a bit and I do see pretty good accuracy with decent SD numbers.
Tony
