08 PMR gas hog

[lhamilton1807]

Finally got the chance to test my PMR and in testing on a 48/3k tank just ripping without paint is draining the tank pressure incredibly fast. Is this because I don’t have paint in it?

After rebuilding and lubing, I turned the pressure adjustment screw out 3 full turns. From what I recall, 3.5 turns was about at where the stock pressure is set.

[k_obeastly]

If I remember right, the pmr should have double o-rings on the back of the bolt and it shuts off air to the chamber while firing. If I'm correct, it would be shooting a fixed volume of air whether there is a ball or not. 48/3 is a pretty small tank, if you're used to a 68 it may just seem to be going through it fast.

[Ecapnation]

These weren't that has efficient to begin with but not knowing what pressure and velocity you're shooting at isn't helping the situation.

[lhamilton1807]

Good point. I took the gun outside and shot it over the radarchron. It was shooting ~315fps so I tuned to about 275fps and it seemed to be a little better on air consumption.

I guess I’m just comparing it to my other spoolie, a Phenom that gets ~7 pods off a 48/3k, so I was aghast when I saw the pressure drop so darn fast with the pmr. the Phenom operates at a higher pressure (~280psi) so it might be more efficient than the pmr at ~150psi.

[Trbo323]

Might be helpful to also know how many shots you were getting, just saying "it's using a lot of air" doesn't really help us

But yeah, these were not very efficient. I think you can do some dwell tuning depending on the board though

Sent from my motorola edge 5G UW (2021) using Tapatalk

[lhamilton1807]

I’ll do a better job at recording how much air it uses for 1k pressure and let you know.

[Brokeass_baller]

They aren't very air efficient. But stock, Dye had their dwell set at 40ms or something astronomical. It made for a very smooth shot, but terrible efficiency. Drop that down until you start dropping velocity, then bump it back up a few ms for reliability. That'll help you out a lot.