Thanks for that mate.

Hi, can anyone give me any advice about the removal of the new anti-tamper screws from an s410?
The older ones just had a blanking plug which was easy to just drill out but the new ones are different.
Any advice would be gratefully received.
Thanks

From that Mike, I'd say you have 39 shots at an acceptable variance.
It may be that you allow more tolerance, (a greater velocity spread), so it's subjective.

Chris

Hi Mike, I fill to 180 and get 50 shots within 12fps from my .177 carbine.
Great guns by the way.

Chris