Ok here is some data I compiled. Sorry for the crude hand drawn spreadsheet. I forgot how to do Excell. I have done it by caliber , nozzle number and regulator setting. I was going to start at nozzles .2 and .5 but I’m after high power so I,skipped to .2 and .4 and worked down . My regulator was set at 151 bar so that is where I started and then adjusted up to 163 bar and repeated just the .2 and .2 nozzles. I then drilled my blank puck out to 9/64” and tried it with some of the .22 pellets at the highest velocities.
you can see the nozzles give you smaller increases in velocity than changing the reg preasure up 10 bar. So the system is pretty precise if you want it to be. I am happy with the velocities I am getting out of the 450 and 350 mm barrels and there is much more available. At 163 bar I was getting around 12 to 13 shots out of a full 300 bar fill. A 350 bottle will help that. You can see I got around 30 extra FPS going down on Each .2 mm nozzle On the 30 caliber. And another 30 FPS when I increased the reg pressure 10 bar. What surprised me was the JSB 45 grain pellet was 119 FPS faster than the NSA 47 grain slugs. I’m not happy with the accuracy of the JSB 45 grn pellet but to be fair the skirts on my tin are not the best condition. The NSA slugs are very accurate but too slow for what I am needing. I have some more testing to do on the 30. I am keeping my fingers crossed that the new .30 Hades will be better.
But I am sure I’ll be able to have one high power tune for the 30 and also be able to switch barrels to .22 and not have to change the nozzles or reg pressure and have a high power hunting tune in .22.
The 22 pellets had very little increase between every .2 mm nozzles or 10 bar of regulator preasure. But as you can see the velocities continue to raise with every change. I am finding the accuracy of the .22 pellets were getting better the faster the velocity at least at 40 yards that I was shooting. There are going to be those who want a higher shot count and that will no doubt come with a lower reg preasure and larger nozzles but not without sacrificing FPE.
For all you naysayers out their, The next surprise was the test changing out the puck on the higher velocity .22 pellets. (Bottom spreadsheet) I drilled my spare puck out to 9/64” . So you can see you can use a high velocity tune and step it down with just a puck change. I don’t think it will help with the shot count. As soon as they are available I am getting 4 more pucks and drill them out in increments of 1/16”. Then have some more fun .
you can see the nozzles give you smaller increases in velocity than changing the reg preasure up 10 bar. So the system is pretty precise if you want it to be. I am happy with the velocities I am getting out of the 450 and 350 mm barrels and there is much more available. At 163 bar I was getting around 12 to 13 shots out of a full 300 bar fill. A 350 bottle will help that. You can see I got around 30 extra FPS going down on Each .2 mm nozzle On the 30 caliber. And another 30 FPS when I increased the reg pressure 10 bar. What surprised me was the JSB 45 grain pellet was 119 FPS faster than the NSA 47 grain slugs. I’m not happy with the accuracy of the JSB 45 grn pellet but to be fair the skirts on my tin are not the best condition. The NSA slugs are very accurate but too slow for what I am needing. I have some more testing to do on the 30. I am keeping my fingers crossed that the new .30 Hades will be better.
But I am sure I’ll be able to have one high power tune for the 30 and also be able to switch barrels to .22 and not have to change the nozzles or reg pressure and have a high power hunting tune in .22.
The 22 pellets had very little increase between every .2 mm nozzles or 10 bar of regulator preasure. But as you can see the velocities continue to raise with every change. I am finding the accuracy of the .22 pellets were getting better the faster the velocity at least at 40 yards that I was shooting. There are going to be those who want a higher shot count and that will no doubt come with a lower reg preasure and larger nozzles but not without sacrificing FPE.
For all you naysayers out their, The next surprise was the test changing out the puck on the higher velocity .22 pellets. (Bottom spreadsheet) I drilled my spare puck out to 9/64” . So you can see you can use a high velocity tune and step it down with just a puck change. I don’t think it will help with the shot count. As soon as they are available I am getting 4 more pucks and drill them out in increments of 1/16”. Then have some more fun .
Upvote 0
