I have been going through some old projects that have been mothballed for a long time, one of witch was to firelap two of my ruger .357s. A BH 6in. and a Security Six 4in. Both SS.
In the 90s I got some lap stuff from LBT to do a rifle and it came out good so I thought I would try it on my .357s. It took ten shots to do my .308 so not knowing how many it was going to take I made up 12 for each gun and fired them cleaned them up and that was it. Thy were shiny and cleaned up good .
Then over the years I have read about the barrel choke thing and pushing a patch on a jag I thought I could feel a tight spot at the frame but it was hard to tell. So I thought I would mess with it some more . This time I had some Lee 140s cast soft to use to slug the bore with. With the barrel well greased I had to tap it with a hammer to start them but was able to push them the rest of the way with just the rod I was using. What I found was that thy were both a bit tight at the front site but then it was easier till I got to the roll stamping, where it got tighter as I got to the middle of the roll stamping and then got easier again till it was out of the barrel. This was the same on both guns. The thing is that I didn't feel any resistance at the frame , just under the roll stamp. Slugs that were pushed through fit through the cylinder throats with just lite finger pressure .
After reading everything I could find with the search I haven't seen anything like this. Most of it has to do with the choke at the frame with most saying thy needed 50 to a 100 shots to get rid of the choke . But if all I want is to get rid of the tight spot under the roll stamp how many shots do you think it will take? Have any of you came across this?
Also I have some cast wadcutters and some HB wadcutters that are softer and was wondering which would be better. The harder ones may cut faster but would the softer ones give a better finish?
I may not get to this till next summer but it's something to think about in the mean time.