For the 3/4" of barrel...less than 50 fps in most cases...
One actually has more concerns over a .45 with a short barrel because most .45 loads are already under 950 fps. Loose much more and the hollowpoints won't open at all.
With a CorBon .38 Super going from 1450 fps to 1425 fps is within the area of standard deviation from 5" barrel...so one won't even notice the difference.
...and to me Commanders just point and balance better than a GM....
Bob
