Strong wind on 425yard-ATP Super King 

yes it is with the M24 and we are already shipping to the US, we are just waiting for the rifles to be stocked back to the eshop.

twist 1:12 is enough to stabilize them, but it makes the BC a little worse (barrel 1:12 is just used in the video) A twist of 1:10 would be fully optimal

Thank you, energy of 143J (.22) can be achieved with a 755mm barrel, which is a speed of around 256 m/s with these 67gr. Airgun with higher pressure can also achieve higher velocities that this.