Double check the gun fit.
As we age, or if we undergo any changes due to injury, surgery, young and still going thru growing stages, or shrinking due to getting older...
Gun fit can and will change with the shooter. What used to fit, don't.
One needs to check POA/POI.
Get 2 - 3 pcs of typing paper, [ depends on two barrel gun or repeater] and put a black dot in the middle of each. Set these about 3- 5 yds apart. Distance of 21 yds out.
Observe all Safety Rules.
1. Close eyes, low gun, then mount gun to face and shoot as fast as can.
See where pattern denisty is.
Me, being me, I do this with slugs.
2. El Presidente' - shotgun version is what I do.
Same as above with the paper. Again me being me I most often use slugs. This time the paper may be numbered big enough to see, or use colored paper, or the persons with me yell out "right" , "left" or "center".
I start with my back to targets, muzzle up and at the start, Turn I shoot at what order I am told as fast as can.
I turn the same way / direction I do when I do this with a handgun...I do this with rifles too..
If the gun fits well, POA/ POI will be consistent. If not, again one will see the "off" POA/ POI being duplicated each shot.
Last time I did this drill, they tripped the cord and the Tueller Drill was heading at me...they didn't tell me we were gonna do dat. I was shooting a gun that was new to a student, and honestly did not fit me very well....I also did not shoot Target #3 as they yelled at me to shoot...I just got a shot off on the Tueller...not dead center, but close enough for gumbmint work.
I don't mind very well sometimes....
My point being, I have seen folks start missing certain birds, presentations. They may be seasoned folks, so we problem solve, and many times it has been their body changed for some reason, and the gun that did fit, now does not.
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Distance was mentioned - how true!
If you do not already do so now, start doing this now. Start guaging distances. With my stride, one step is about a yard. Measure yours to get an idea.
"That blue car is 25 steps/ yards away in the parking lot" - then step it off. Turn around and look at starting point. Get the human computer programmed to guage distance.
Dove hunting, Duck hunting I/we use distance markers. Dekes are easy to set out and know distances. So are doves, I use gray shop rags, I have been known to invert a empty coke can on a pc of vegetation and tell a kid that his their shooting distance...wait until the dove comes to you within that distance and shoot.
Size of targets make a difference. I got kids /ladies about to go on first dove hunt, using ping pong balls painted gray and setting them in the house, in the back yard and guaging distances. I mean if a dove gets within one kids bedroom and living room distance, that dove is a goner.
Midi and ZZ birds...oh yeah, go watch these to train the brain. Don't have to shoot, just pay attention to a regular clay and midi being tossed the exact same path, angle and distance. That midi will look further away.
I'm serious, I have folks setting out shop rags, gray ping pong balls, or soda cans with the ends pointed at them- in the back yard, kids and their mom's moving and changing distances and a game as to how many "steps" to these.
Now up in the sky this all appears different too. So up in a tree there is a gray shop rag, directly underneath it is a shop rag too. Mom and kid walk all over the yard, and stop at various places to gauge the distance from various places.
"Well I don't want to shoot looking at the sun mom, it messes me up as to how far it is".
I know , this all sounds dumb, but these folks are new to shooting, and never hunted doves before. This will work...I've done this before.