Loaded three batches of .38 Special. All starting weights. Identical components except for the powder used. Of course each powder charge was different but nearly identical in published pressure and velocity. AA #2: Felt like a +P load. Sport Pistol: Very mild recoil. Similar burn rate to HP-38/231. VV N350: Extremely mild recoil. Interesting that the VV is way slower burning than SP but felt recoil was similar when fired back-to-back. I read that slower burning powders have less felt recoil than the faster burning powders. Didn't hold true in the SP/VV test. The difference is noticeable but not as much as I thought it would. Fired out of 642 J-Frame. 158gr. LSWC. No trace of leading. As a matter of fact, I've never cleaned a gun after a range trip that was so clean.