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Choosing the right spring and making it work.

125K views 91 replies 35 participants last post by  dschmidt 
Does anyone know the relative length and outer diameter differences of springs for the various platforms? For example, are VSR10 springs longer than APS2 springs?

I recently bought a VSR10 Laylax SP170 spring for my rifle, which was quite a bit (~1.5in) longer than the stock spring. It shot great at first, but quickly dropped down to the 2J range, and the only thing I can attribute the power loss to is the fact the spring is much shorter than when first installed.

I could not find anything regarding this topic, which is odd to me as this is a fundamental part of spring physics.
 
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