Seems like there's a lot of space between the inner barrel and the outer one durka. Elaborate?
Lack of materials.
I could of went to home depot and have gotten a better fit for the cpvc but the breech doesn't rely on a seal between the cpvc and the pvc, like red stars does. Just use e-tape to center the cpvc in the 3/4 pvc.
I have a lot of 3/4 pvc so I will be using it untill I run out.
On another note, I have been working on a deodorant clip for a similar breech. I don't think its worth the time as of now. I hate making deodorant clips.