I think get your basics right on the gun you feel you shoot the best. From the evidence at hand, it is either the TS or the PM9.
I generally do not shoot more than 2 guns in one session, unless someone wants me to try his gun out, or something unique turns up that I want to try out. Many of my sessions are planned around one gun only. The second gun is usually the SD gun.
Now, the technique:
-Breathing, take a few deep breaths, then one long breath, exhale about 70-80%, shoot within 6-7 secs.
-Sights, get the sight picture right, then shift focus to front sight only. Let the target blur a bit in background. Do not mind slight wobble of the gun. In the 6-7 seconds, there is a sweet spot where the wobble is minimum. Find it for yourself.
-Trigger, squeeze, straight back. Do not pull or slap/jerk. Squeeze like you would squeeze a lemon..if you get what I mean
-Grip, have a medium firm grip-not too tight. When breaking shot, do not tighten fingers, do not tighten/loosen overall grip, let the trigger squeeze break the shot, but the trigger should not break your grip or your wrist position. I tell shooters at the range to let the gun fly, its not going anywhere. A lot of shooters anticipate or fight recoil, and get low shots, low left shots and low right shots. Some anticipate and start the recoil before the shot broke, get high shots, high left or high right. Let the recoil cycle run its course, let the gun fly. Do not fight it. Pretend nothing is happening.
-Focus on all above. A bit of dry firing at home always helps (ensure safety at all costs). Do notice what tightening fingers or overall grip does to your gun, after you acquired sight picture. It will help you to focus on this common problem in live fire. This is what I see in your 75BD target.
-Shoot strings of five shots, mark the groups separately, give each shot at least 20-30 sec. Lower your arms after each shot, and breath/relax. Then breath, and raise again. That will help you retain strength for longer periods, and you will have less fatigue in your shoulders, arms, and perhaps even eyes.
Check below link. It is very helpful for basic slow fire precision. Choose what applies, and leave the part for head position/stance if you shoot with double hand grip.
http://www.issf-sports.org/theissf/academy/e_learning/pistol.ashx