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PostPosted: Thu Jun 26, 2014 5:18 pm 
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Joined: Mon Sep 07, 2009 9:23 pm
Posts: 282
Location: SW Ontario
Hi All
I bought a 2240 with BNM breech recently from another member. The transfer port had been replaced with a piece of vinyl tubing, but this was spewing CO2 with every shot and power was way down. I trimmed the tubing flush with the bottom of the breech and fit a stock transfer port into the vinyl which brought the power up and reduced the leak but still only getting 375 fps with that setup. Anyone know where to find the correct transfer port for this application or any ideas on how to keep the CO2 flowing cleanly and with a large enough diameter to keep power up to specs. I'm pretty sure it has a high power valve since it only gets about 12 shots per cartridge. I could always put a standard valve in as long as I'm not wasting gas all over the place the way it is now. Suggestions?
Thanks
Rae


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PostPosted: Thu Jun 26, 2014 6:32 pm 
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Joined: Mon Jun 24, 2013 6:54 pm
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http://www.bnmcustom.com/product/hardware-set-breech/


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PostPosted: Thu Jun 26, 2014 7:03 pm 
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blarg wrote:
http://www.bnmcustom.com/product/hardware-set-breech/


Thanks for that blarg.


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PostPosted: Thu Jun 26, 2014 7:19 pm 
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Joined: Mon Jun 24, 2013 6:54 pm
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NP, with an oring fit in the breech it makes ya wonder how or why the poly happened.
I would read that story.


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PostPosted: Thu Jun 26, 2014 7:47 pm 
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Location: Victoria, BC and Clarkston, WA
Lots of people swear by the poly tubing and getting a better air tight seal. It may take three or four trail fittings to get them just right. You want a about 1/64" compression or .015".

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PostPosted: Thu Jun 26, 2014 10:20 pm 
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raezor wrote:
it only gets about 12 shots per cartridge.


:shock: 12? What caliber is it?


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PostPosted: Thu Jun 26, 2014 11:42 pm 
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EverHopeful wrote:
raezor wrote:
it only gets about 12 shots per cartridge.


:shock: 12? What caliber is it?

I'm guessing its .22 there Jim :wink:
12 shots :shock: , sounds like your waisting unused CO2

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PostPosted: Fri Jun 27, 2014 2:30 am 
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Too much hammer can make piercing pin stick in cart.
Evacuates valve completely, pressure drop allows pin to be pushed out, repeat.
Until it sticks in there and a pressurized teardown is unavoidable.
Not a transfer port thing although the wicked chill can shrink stuff and leaks result, in less important places considering the usage.


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