Lengthening the chamber and making the ejection port longer on an A5 is just the beginning.
There are about 11 different machining steps required to convert an A5 to 2 3/4".
It is not a simple thing to do.
The half inch hole saw sounds like a bad joke.
If you wanted to accomplish that all you'd need to do is hold the crimped shell up to a belt sander for a few seconds....the rim of the crimp would be near gone in an instant. You'd eject a short hull when you fired it, but your velocity would go in the crapper without a tight crimp because you would not develop the pressure at ignition needed to get the proper burn.
Jeff
