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Cocker Internals for Running on 12 Grams

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    Cocker Internals for Running on 12 Grams

    I have 2 Cockers that I am converting into Snipers. Most of the time they will be set up for stockclass style play running on 12 grams. One is a 2K style body by Hybrid that has been cut to a mid block and the other is a Dye Ultralite Mini Cocker. What internals would I need to change in order to get each one to run good (not necessarily looking for efficient, but definitely consistent)? Would I need to look for a different valve or would playing with the springs be best? Any help would be greatly appreciated.

    #2
    Don’t do anything to what you have in my opinion . I jump back in fourth from 12 grams to HPA all the time with no issues whatsoever

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      #3
      Regulate it and run it just like HPA. My CCM gets about 30 shots on a hot day. (If you shoot slow)

      Unregulated is difficult to get just right. Heavy spring combo and a Palmers HP valve was the only way I got mine to shoot right. There is no Magic spring combo each setup is different. Pick a temp range you plan on shooting it in because you won’t have much velocity adjustment range. It’s a lot of trial and error.

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        #4
        Originally posted by Chuck E Ducky View Post
        Regulate it and run it just like HPA. My CCM gets about 30 shots on a hot day. (If you shoot slow)

        Unregulated is difficult to get just right. Heavy spring combo and a Palmers HP valve was the only way I got mine to shoot right. There is no Magic spring combo each setup is different. Pick a temp range you plan on shooting it in because you won’t have much velocity adjustment range. It’s a lot of trial and error.
        Are there any signs I should look out for that would tell me I need to try a different hammer or valve? I have an old Shocktech heavy brass hammer and a Rat Valve lying around. Both Cockers were bought second hand and I don’t know how to identify the exact internals in there now. I will take both of your advice and run them regulated instead of straight to the VASA.

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          #5
          Use regulation to get consistency. If you need lower operating pressure, higher velocity, or better efficiency, that's when you worry about the internals.

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            #6
            Pre 2k get better efficiency because it’s holds less volume. But definitely regulate it. Just make sure your reg you are using operates with in the pressure range of a 12g and you are good to go. I throw an ICD lever changer on the back of my stock CCM cocker pump. If I run it on Air at 300fps putting 12g to it it shoots about 275-280fps without adjusting it. I usually just use it like that for the day so I ensure I get at least 30 shots out of it. Only thing I recommend is getting good fittings and line. Those macro fittings do not like the on off pressure of 12g. But basically you can setup a cocker pump for 12g the same way you do HPA. You want to fine tune it you could optimize it a bit pick up a few shots here or there but cocker pumps really don’t run super good on 12g efficiency wise. No matter what you do to them.

            un regulated is a bitch to get right it takes burning a lot of 12g and lots of chrono time to get just right. + you get spikes so it’s not very consistent. Unless you really take your time and let the 12g cook off after each shot. My KCPS Scout is like this. I have custom spring setup I got from Home Depot and a Palmers HP valve so it will hit field speeds. Your typical Cocker springs don’t give a standard hammer enough OMph to get decent velocity. I must have cracked 100+ 12g just getting it to shoot.

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              #7
              I am considering this too, I want a to build a "stock class" sniper. I was imagining a right feed body modified for Phantom feed block and running a 12 gram changer. Palmer's HP low turbulence valve. But if it's really that much of a pain in the arse...may have to come up with something else
              Feedback 3.0

              Originally posted by SignOfZeta;
              Us beardos with wallets need to occasionally make our voices heard.

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                #8
                The Palmer valve with right springs would do just fine

                or throw a 12 gram on a normal regulated gun and use as is. Would probably be fine and greatn

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                  #9
                  Maybe get a CO2 tank for testing if you decide to start playing with the internals, instead of burning through 12g's.
                  Feedback

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                    #10
                    Even an HPA tank is fine for coarse tuning. I tune/test my azodin using hpa at home, internals work similar to a sniper. When I get to the field, only adjustment I need to make is bump the reg pressure up a bit. Or just shoot a little slower for the day and touch nothing.

                    I run the 12g on a bottomline asa, tune the hammer spring pressure until it's consistent, then adjust reg pressure to get velocity I want. 30 shots a cartridge no problem.

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                      #11
                      Like others have said, run it regulated. With my S6 I switch back and forth and only have to adjust the velocity a little. On a 12gr the gun shoots 15-20 FPS slower than it does on HPA. I have a pre2k that is very similar. I run that at about 350psi with a stock valve and hammer.

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                        #12
                        Thank you everyone for your help. Here’s a picture of what will be my Sniper Ultralite. I ordered a braided stainless steel hose to replace the macro line. Click image for larger version

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                          #13
                          Cool build! I would recommend a different HPR, mini-regs are notoriously janky.
                          💀Wild Card, Ragnastock💀

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