Is fittingSlip/ power washers necessary when tuning?

[Hollowpoint]

I’ve fitted a spring and matched guides to a tx200 along with a Brit seal. With the spring as is and the machined/ fitted guides the gun has settled on 10.5ft/lbs which is exactly where I wanted it. This does mean though that there is no delrin slip washer fitted in the piston or delrin power washer fitted between the spring and guideThe gun is firing lovely and smooth as is but I can’t help wondering if I should collapse a coil and fit a delrin washer on the guides and in the piston. Would it make it even smoother or would there be little gain and just leave it as it is with just the spring, guide, tophat and no washers.

 

[Bighit]

If its shooting fine as it is then leave it .

 

[Martin Bacon]

As above - if I reach a point when fettling rebuilding any rifle : - if the shooting is smooth & accurate , consistency & power are where I want them - I leave it as it is !

 

[Varminter]

The point of a slip washer in front of the spring is to reduce torsional recoil as the spring decompresses on firing, if you feel the gun is shooting nicely without one and you’re not detecting any twist (torsion), I wouldn’t bother fitting one.

A washer between spring and rear guide is purely to increase preload and thus power, so again unnecessary if you’re happy with the power level already.

 

[Martz]

TX pistons rotate so if all is well, leave it. It might need a washer as the spring takes a set or the moon moves.

 

[Hollowpoint]

Thanks guys. That’s what I’m thinking. I did think if the power crept up then I would then reduce a coil and maybe think about adding them. As it stands it’s shooting nice at around 10.5 very consistently so I will leave it as is for now.

 

[P8X]

The rotating piston will (should) take any torque twist out of the equation, but I'd fit a slip washer both ends as a matter of course

My choice would be a 1mm shim steel washer wither end