I second the remarks of Mr. Smith. Everything he says is what I would have said had I gotten to this thread sooner. That said, the .38 Super out of a Commander barrel (in my experience) has a lot of flash, which indicates unburnt powder ignited after the bullet has left the muzzle. For this reason, I prefer the Gov't Model in .38 Super so as to wring out all the velocity I can from this round. Now, I have not chronographed the differences (if someone has, please let me know), but it seems from my observations that the .38 Super works better in the 5 inch barrel. It is possible to carry concealed a Gov't Model with the right holster if you can handle the heft. Classic pistol, great round, and the best way to utilize the medium bore in a 1911.