Nice video. I noticed that your left hand/thumb could not stay in place when shooting the 27. You had complete control with the 26 but not the 27 due to the recoil and your arthritis. I think you should rethink your choice as not all self defense situations allow both hands on the pistol in an optimal grip. You might have to shoot strong hand or weak hand without your second hand. It's a pretty noticeable difference watching you shoot the 27 compared to the 26. Basically with the 26 and 147 HST you are gaining an extra round and control that you clearly don't have with the 27. You can try 124/147 HST or Speer gold dots(124+P) and see what your 26 likes better. Due to the "snappiness" of the 27 I suspect you concentrated harder trying to reaquire the target. I have nothing against the 27 as it is a great pistol.