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pump stroke question


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#1 Snowking63

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Posted 30 April 2013 - 02:28 PM

So I want to acquire a smooth pump stroke...
I have the BASIC vendetta pump kit which I would like to swap to the legit vendetta sometime. Would this REALLY improve the smoothness of the stroke;) or not so much?
To me, it seems like the pump stroke hits its peak of torq (or difficulty) when the bolt hits the hammer to put tension on the main spring. If I swapped the main spring out to a softer one will this play a huge roll on the performance? I know the pump stroke will be easier but I'm sure this will change the velocity right?

#2 1shot

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Posted 30 April 2013 - 09:06 PM

You are correct, it will lower your velocity if you use a lighter main spring. This can be overcome with changing the valve spring and sometimes the valve itself

#3 Praetorian

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Posted 30 April 2013 - 09:13 PM

It's why CCM internals actually make your pump stroke smoother. lighter spring and the Valve opening is a bit larger(to allow more air)

Edited by Praetorian, 30 April 2013 - 09:13 PM.


#4 Demon

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Posted 07 May 2013 - 11:21 PM

sweetspot your reg so you can have the least pressure on your mainspring and throw in a CCM spring and valve kit or a maddmann spring kit.

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#5 Snowking63

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Posted 08 May 2013 - 12:04 PM

I'm not exactly sure how to sweetspot a reg but I'll look it up once Im back to my state. & I believe I will be putting some slps springs on it




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