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Old 03-12-2013, 11:37 PM   #14 (permalink)
Tinman
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Join Date: Aug 2010
Location: Brighton Michigan

I think that marathon has a brand new sterling, these come with very light hammer and valve springs. It is a completely different animal than a proline sterling, with adjustable velocity and all. for consistency arrow recommends 600-650 psi hpa
If he goes and drops a cut spider spring in it, it will do nothing positive for his marker or his pumpstroke.
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Last edited by Tinman; 03-12-2013 at 11:41 PM.
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