either way i can adapt the design to accommodate the power adjuster screw, as it is my first go lets just stick to the original design posted by eyeball..

one question, i will have a tinker with the spring and length of bolt, but was curious as the the length of bolt you ended up using..

will post pictures soon and maybe some results

though i am also working on a brass chambering section - idea is to lap the muzzle and breech end of the barrel for smoother pellet transition and exit which i wanted to finish before doing any chrony work..


cheers
Andy