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Militant_Mind · July 18th, 2013, 20:36

So I put a madbull 6.03 tightbore into my scar. I then loaded a mag with

bioval .20 to test the fps, and it seemed to be shooting fine at about 350-360.

But then when i loaded a mag with my madbull .28 and it started making a weird

pinging sound when firing, and the bbs are spinning right down no matter what I

adjust on the hop up. So i took the gun apart and started over and the same

thing, the .20 bioval seem to shoot ok but not the .28s?? Any ideas?

July 18th, 2013, 20:36	#1
Militant_Mind Trader rating Join Date: Apr 2012 Location: Clinton Ont.	Issues after tight bore... So I put a madbull 6.03 tightbore into my scar. I then loaded a mag with bioval .20 to test the fps, and it seemed to be shooting fine at about 350-360. But then when i loaded a mag with my madbull .28 and it started making a weird pinging sound when firing, and the bbs are spinning right down no matter what I adjust on the hop up. So i took the gun apart and started over and the same thing, the .20 bioval seem to shoot ok but not the .28s?? Any ideas?