I have one pro hunter and one encore.
The receivers are similar the major difference being the hammer. The hammer on the pro hunter can swivel.
These products have no hanger bars, I know the Ruger has a hanger and will assume Winchester and Browning also.
a- accuracy is what you define; I like what mine can do.
b- I have not changed the pin yet, but I find a real wood stock seems to promote a tight lock up. I am looking at adding a hanger bar, but I will have to wait for the money fairy to reward me.
On my pro hunter the receiver screw would come loose after some use; I used some lock tight and haven’t had issues since.
I believe what the belim site promotes, but I have not done any of the changes.
c-break it open and the extractor present the case, pull it out.
d-the cost of a barrel and not having the ones that were once available.
e- yes
Too much information on the web and it is difficult to make a decision, but used this link when I was looking.
http://www.varmintal.com/ashot.htm