RX2 gas ram pump?

[PakProtector]

hey-Hey!!!,
Any alternatives to the almost $300 pump and gage kit from Beeman for playing with the ram pressure in the RX2? I got on the phone with Airguns of Arizona after finding them in a search for the pump kit and found out how much it costs. Now I did get another suggestion; using a Disco pump with a Foster-Schraeder adapter. This also looks to require some modification as the Disco gage is not going to have an easy time telling 21.5 bar from 22 bar. The ram pressure is  less than 26 bar so something capable of ~400 psi looks about right. Hopefully I can find it for less than a Franklin, instead of some large fraction of a McKinley...

For a drier I plan to run a coil os seamless SS tubing through a can of ice water on the HP side. Can't be putting water in qty into the ram.
cheers,
Douglas

[tjk]

Been down this road before. Forget the gauge. It's a waste of time and money. SS sells a Pump and hose adapter that will work on your RX. The best way to measure the ram pressure is to use a chrony and a fpe conversion calculator.  Bar pressure is secondary to actual performance. I don't bother trying to figure out bar settings anyways because two rifles set at the same bar setting won't always shoot the same velocity, and two rifles shooting the same velocity won't necessarily have the same ram 'bar' pressure setting. Hth's

[PakProtector]

----SS sells a Pump and hose adapter that will work on your RX.

Thanks tjk, but that is the $200 solution I seek to avoid. It turns out some bicycle shocks take high pressure. I found two pump variants with prices less than $50 that are capable of the up-to-350 psi the rams require. Just a matter of fitting in that SS adapter as none of those pumps appear to have male schaeder valve outlets...just to confirm, the ram has a *FEMALE* schraeder connection, yes? this being accessed through removing the cover plate at the butt end of the breech?

So, Cannondale Airspeed shock pump, a bit of 1/8" seamless stainless tubing to coil up as a condenser, the SS adapter and a few fittings are leading the chase now...and that pump has a gage that should be capable of preventing me overpressuring the ram.
cheers,
Douglas

[tjk]

It really doesn't matter what price range you want to pay for a pump and hose set-up. It is going to cost you something. The way I see it, if your going to spend the money on a good gun, why not spend you money on the accessories that were made for it. Sure, you can try finding shortcuts and cheaper routes to take, but after out sourcing all the components, you will eventually spend about the same amount with the added amount of time wasted. Like I said before, the gauge is a waste of time and you will be better served with a $75 F1 chrony. As for pumping moisture into the ram,..... If done in a normally climate controlled environment, moisture build-up is not as much an issue at all.  Pcp's that use various internal valve/air reservoirs are a whole different animal. If you want to protect the internals of the air ram, you can add a drop or two oil air tool oil to the hose before connecting it to the pump. This will spray a mist of tool oil into the ram that will prevent rust and help keep the orings and Schrader valve seals supple and air tight. Hth's

[tjk]

Oh I forgot. The Schrader valve to charge the gas ram is conceeled by a flat head screw at the rear of the action. The Breech is where you place the pellet. This rear plate is actually the back part of the gas ram itself. Never attempt to dis-assemble the RX without emptying the gas ram of its air pressure.