[gunny2812]

i have a fully upgrades TM VSR, when my hop up if 100% off it shoots a consistent 545 FPS (.20) when i dial my hop up 1/2 way i loose 45 FPS.

i do understand that when you turn your hop up dial more of the rubber contacts the bb for more backspin but is loosing 45 FPS normal?

with the mod i did to the stock hop up arm the adjustment bar has to be turned on 3 clicks from the off position to just slightly overhop a .40bb.

ideas?

 

[fdkrew]

Are you using he stock hop up unit? If so I would recommend shimming your hop up and doing the TDC mod. Also an aftermarket bucking would also help with consistency.

 

[gunny2812]

my hop up unit is a TM precision chamber and my bucking is a PDI whold.

 

[Lightbulb]

Does the gun shoot straight? Happy with the range?

'losing' 45 fps is meaningless. The above is all that really matters.