Well I had my little lady out today. It was snowing with the temp just below freezing. Due to a number of reasons tests were shot at 50 yards rather than 100 yards. Using IVI 174 gr FMJ Ball managed a group of four @1.26". Using 180 gr IVI Soft Point managed a group of four @ .969". All groups were 2" low using the sight set at the bottom of the stack. This gun has the "S" rear stock which will be replaced with a "L" next week. I have long arms.
As to the cases measuring first approx 3/8" in from the rim, then the shoulder then the neck at the center here are the measurements.
New: .446 .398 .336
Fired: ..454 .406 .344
Exp .008 .008 .008
I am in new in new territory here so what all this means in terms of relative chamber size etc is an area I look to those on the board with far more knowledge then I for comments.
I will changing out the front sight to get my gun shooting closer to POA at 100 yards when the sight is set at the bottom. For ranges closer than that I can use the battle sight.
I look forward in developing CB for the gun using my Lee produced boolits and hopefully a Lyman 314299 boolit.
Dave as soon as my dies arrive I will try your load for the Lee boolit.
Take Care
Bob