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| CCM Chipley Machine |
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| | #1 (permalink) |
| Yngling Half troll | Having trouble sweetspotting S6.5
Hey guys, I'm currently having trouble finding a good efficient quiet gun. CCM recommends 350psi, however it's very farty and inefficient. If I lower the reg pressure (and it starts sweetspotting at around 290 psi..) it is quiet, but extremely inefficient. Getting 90 or so shots off a 13ci. Ideas? |
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| | #2 (permalink) |
| Olde Basterd#2 |
Double check your reg tester and really go slow as how much pressure is set. Then slowly bring in your IVG to make velocity. Also polish your bolt and make sure it's sliding freely. I'd try 325 PSI and go from there. I've never set up a 6.5 but have an S-6. And contrary to popular belief there is a difference! Just go slow no big turns one shot at a time. Feyd...................
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| | #3 (permalink) |
| Unharshed Mellow |
You don't really 'sweet spot' at 6.5. To truly run the reg at its most efficient is to run the marker at over 300 FPS. Set it at 300 - two turns in on the IVG - and tweak it to get greater efficiency. I have to tell you though - I have never heard a CCM with a modern (non-delrin) valve pin fart. I have heard it get chuffy (too much air escaping) - but not fart. Something seems odd about that comment. TF |
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| | #4 (permalink) |
| Yngling Half troll |
It's definitely farty. I managed to catch tf's comment before the end of the day, and I had about 100 rounds left. I started it like this: Ivg two full turns from flush. CCm refulator adjuster flush with bottom of reg. As I turn up the pressure the velocity immediately starts going down. So I back it up a little bit and find the highest velocity possible using the reg. (which was about 260 or so) However I'm still getting the same 100 shots per 13ci tank. |
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| | #6 (permalink) | |
| Brass Virus Carrier |
Edd, How old is your marker? How many cases? Have you tried breaking down the reg, cleaning, and giving it a good lubrication?
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