Sure Kidcom,
With the barrel off the frame.....
Looking into the chamber, while "pointing" the crown end at a brightly lit window....
I can see the chamber...nice
I can see the rifling and nice smooth shiny bore extending towards the crown end of the barrel.
For the most part of the barrel ( until about an inch from the end ) the bore and rifling looks smooth and uniform.
The reflected light along the bore appears even and flat.
About an inch from the crown, the reflected light appears to change.
The bore no longer reflects light in a smooth even flat way.
It is not "dirty" or lead. It is just not as "flat" as the rest of the bore.
I would say about a 1/4 of an inch worth.
The rest of the barrel up to the crown then looks "normal" like the rest of the bore.
I am not looking to "reline" the barrel. This is a "new" gun and should be covered by S&W warranty.
Besides, I do not think we have any suitably qualified gun smiths in my state that could do this.
People have enough trouble just getting a trigger job done locally.
I have owned the M41 since Xmas 2014, so 18 months ago.
I first noticed the issue about 6 months after purchase.
At that time, i worked away and had only shot it maybe 3 or 4 times.
As a first time shooter, I was pretty excited just to be on the range.
Examining holes in targets was furthest from my mind.
I also thought that it would be more accurate than it is, but again, I figured it was just my inexperience, and never thought that there could be an issue with such a fine gun, let alone a PC version M41.
When I first saw the key holing, I was not really sure what I was looking at.
I thought it was just how the targets were, because the core-flute backing boards are pretty shot out behind the 9 and 10 rings, so I just thought it was maybe the way that the paper target was tearing.
As I said before, the issue is not 100 % consistent. Some weeks it is hardly noticeable, other times it is quite obvious.
I started to really look at the targets for the next few months and talked to more experienced shooters about it.
They were puzzled and had not seen key-holing at close range with none at longer ranges.
I happened to talk to a fellow club member who had also purchased a new M41 ( standard version )
He was also having key-holing issues, and he found that towards the end of his barrel, it appeared to be slightly bigger diameter that the rest of the bore.
He managed to borrow a slightly used barrel from the Aussie distributor, which fixed his problem.
He is also waiting for a replacement barrel ( under warranty, as well )
Hope I have managed to describe the issue clearly enough
Any help, advice etc will be very much appreciated.
Cheers all
David