RDS arrived today

The new and much improved RDS arrived today. The inexpensive ebay trial unit has been returned and the new Holosun 507C X2 is installed on the K38. What a blessing for elderly eyes.
This new RDS has all kinds of nice features, like a solar cell across it's top that powers it in bright conditions while the battery works in low light. The unit turns itself off after 10 minutes of no movement and will return to the same brightness setting if it senses movement. It has 3 reticle settings, dot, circle and circle with dot. Many other options there too, the instructions sheet has half a page, small print, telling me how to set up different things.
It goes to my club tomorrow to be zeroed and get me used to it.

Glenn;
With all due respect, good accuracy with a handgun is 80% shooter and 20% firearm. Your 686 (like mine) is an excellent revolver, well known for accuracy. My suggestions are:
1, Get yourself a .22 pistol of decent quality and several bricks of .22 ammo.
2, Go to your favorite range or club & watch the shooters. When you spot one that is getting great accuracy, ask him / her to watch you shoot your .22 and critique your stance, hold, trigger pull etc.
3, Listen to what the good shooter says, take the advice and practice practice practice. Do this with other good shooters again and again as you learn.
4, WITH A GOOD SNAPCAP dry fire your .22 or 686 at home while watching the front sight for movement. The red dot will clearly show errant movement with trigger pull.
5, Practice practice practice.
6, Practice practice practice.
Finally, with your 686, find some target wadcutter .38 special ammo & practice with that NOT .357 ammo. Remember to carefully and thoroughly clean your cylinder to remove the ring from .38 ammo.
In the end, a properly adjusted nut behind the trigger is the answer.