Surgery time!

One hour later after removing the Madbull spring and  fitting an XT100 spring, chrono’d it and it’s bang on the money at 348/349 with.20g. Very happy indeed.

 
One hour later after removing the Madbull spring and  fitting an XT100 spring, chrono’d it and it’s bang on the money at 348/349 with.20g. Very happy indeed.


nice 1, might be worth putting a few mags through it to bed the spring in more as chronos can vary quite a bit.

I've had mine firing at 345 at home and 360 on a site chrono on a .20

 
nice 1, might be worth putting a few mags through it to bed the spring in more as chronos can vary quite a bit.

I've had mine firing at 345 at home and 360 on a site chrono on a .20
Will do, thanks for the tip off .??

 
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