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Old May 29th, 2005, 12:39   #5
Greylocks
 
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Join Date: Dec 2001
Location: Gatineau, Quebec (Near Ottawa)
The safest way is to actually install each in a particular gun, chrony them, and label the results on a small piece of paper you can tape to each spring.

Guesswork in upgrades is never a good thing.
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