Nice progress!
lol, yea i can make breeches.. Barrels , not soo much .. I tried rifling my own 25 cal barrel once with a china button, the button is still in the barrel in some landfill as of now.
Yes ,a bigger caliber will make better use of low pressure high volume air.. I just wanna get this one dialed in to shoot 22 at max velocity and see where i stand .. So we shall see.. Ive actually always been a hardcore fan of co2 ( low pressure ) bigbores.. Last one i made was a .50 cal 100.2 fpe with round balls.
Congrats! That's gotta give a big feeling of accomplishment. I like putting together from different groups of parts, but don't have the machinery or skills to go at it from scratch. Maybe one day...