Also, I installed the bolt in the breech, closed the bolt and it doesn't seal up the loading port. I shined a light at the loading port and looked at the barrel and I can see light coming thru...I am afraid I will have air coming out of there instead of blowing toward the muzzle..there is an o-ring on the bolt, yes.Any ideas?
the bolt is .22 can tell by looking at it
Not wanting to HiJack thread, do you have to drill a new hole in tube , when installing the new style breech? Inquiring mind's would like to know!
The edge that is at the exit of the barrel is the crown. The entrance to the rifling is called a leade. The leade is a gradual taper into the barrel to ramp the pellet in so it engages the rifling with minimal abuse to the pellet.The Leade is very important to make sure the transition is not abrupt and rather than a step that can damage the pellet as it enters we seek to have a nice beveled entrance as smooth as possible to help the pellet enter the rifling without shedding debris.The Crown by contrast wants to be smooth but there is no intrusion to the rifling but a very clean concentric release to the pellet that is burr free. The tools needed to do a crown Job are not in any way related to the tools needed to do a proper leade polish.There is great opportunity to improve production leade and crowns so that accuracy can improve realtive to the production item. Done right there is never a loss of accuracy when these improvements are made but sometimes the improvements will be marginal. It mainly depends on what we find. Burrs on transfer ports, stepped leades, excentric crowns, rough leades, Burrs on leade transitions and ragged Production Crowns all give us the opportunity to improve the accuracy of a production barrel. Bellmouth muzzles and tight Breeches are about the only conditions we can't improve upon because these are generally counter to the what makes accuracy. The muzzle needs to be tighter/smaller than the breech or the barrel is likely scrap.TimmyMac1
I'd try a dremel over the drill. Drill can gouge or jam/break too easily. I'd also test it as the valve is, before doing any porting. PS: I have some .22 barrels, bolt, and o-rings in my current crosman order.