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ThunderCactus · September 23rd, 2013, 19:21

Best thing to do is to buy a reliable spring of which you know the fps and put it in there. Like a prometheus MS110. Should give you 360-380 depending how good the seal is.

What is your hop set to when you're shooting?

September 23rd, 2013, 19:21	#14
ThunderCactus Not Eye Safe, Pretty Boy Maximus on the field take his picture! Trader rating Join Date: Feb 2007	Best thing to do is to buy a reliable spring of which you know the fps and put it in there. Like a prometheus MS110. Should give you 360-380 depending how good the seal is. What is your hop set to when you're shooting?