Wear points on the frame.
Please look at page 19, post by jfh in his photo#3 he shows the wear points, and among them if you look at two gold dots above the trigger on the left side of the frame you will notice just behind the second dot an arched white line below the recoil plate. That is what we refer to as the contact point of the cylinder with that exact area of the frame when the cylinder is opened.
Any amount of cylinder end shake will move it a bit to the rear causing the rear surface of the cylinder to touch that very area of the frame.
As you can see from this post and others - quite normal.
If you do not have that it only means that you have a lot less cylinder end shake and when the cylinder is opened and pushed to the rear, it does not at all touch the frame.
I hope that explains the problem. Unfortunately I am not quite versed with a photoshop to use a moving arrow. Sorry.
Please look at page 19, post by jfh in his photo#3 he shows the wear points, and among them if you look at two gold dots above the trigger on the left side of the frame you will notice just behind the second dot an arched white line below the recoil plate. That is what we refer to as the contact point of the cylinder with that exact area of the frame when the cylinder is opened.
Any amount of cylinder end shake will move it a bit to the rear causing the rear surface of the cylinder to touch that very area of the frame.
As you can see from this post and others - quite normal.
If you do not have that it only means that you have a lot less cylinder end shake and when the cylinder is opened and pushed to the rear, it does not at all touch the frame.
I hope that explains the problem. Unfortunately I am not quite versed with a photoshop to use a moving arrow. Sorry.