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Tanaka m700 poor gass efficiency
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skapunkninja
replied
13 February, 2018, 12:31
thanks for the advice
the shots that do come out are absolutely spot on. ill pull it apart and take a look inside
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ddb2882
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13 February, 2018, 10:29
Hi ,
If you have more than one mag and it does the same thing with both - its not the mag !
Sounds like the rifle might be dumping all the gas it has on the first few shots , maybe the bolt is too aggressively set or if it has an after market knocker it's not resetting quick enough (this has happened to me) .
If it was me , and the shot that do come out are ok in terms of flight trajectory , I would take a look at the bolt spring and trigger set up .
Hope that helps ?
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skapunkninja
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Tanaka m700 poor gass efficiency
12 February, 2018, 22:50
Tanaka m700 poor gass efficiency
Good evening everyone.
I'm having a little problem with my Tanaka m700 and was wondering if anyone had any advice....
I fill the mag with gas (propane from a Coleman's bottle), but I can only get 2 shots before I start loosing power, as if it's running low on gas. I used a chrono, and from a fresh gas fill I got 499fps, 499fps, 400fps, 320fps, 200 fps, and finally a pathetic little hiss as it ran out.
I've stripped the mag, and can' see anything wrong. Ive tried it outside, and inside a nice heated house.
It's a preban m700 with adjustable bolt/power, with upgraded hop chamber, rubber, tightbore barrel etc.
any ideas?
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