Convergence really is a matter of your own flight profile...and by that I mean...how skilled is your SA (Situational Awareness)...and how skilled is your sight picture for the shot you wish to take...how skilled are you at flying the aircraft you have chosen?
The shot you wish to take is Crucial...because before you can MAKE the shot...you must first fly into the position FOR the shot.
Most of us can get up in the morning and drive our cars to work.
Most of us can drive ANY car to work, at any hour of the day, in any traffic condition...and maintain a safe bumper-to-bumper separation of the car we are driving, from the car we are following, under normal circumstances...because we have Situational Awareness (we check all mirrors, and our heads are on a swivel on our necks looking all around us). And because most of us know the performance capabilities of our cars versus other cars on the road, most of us can eloquently cuss-out the car that cut us off!
During Rush-Hour Traffic we look for "openings" in front of us, a place into which we wish to safely slide in order to improve our position amongst the other traffic.
This is SA at work! When we spy an opening...a place into which we might fit...this is convergence...AND the shot! Whether we drive an old 1962 Volkswagon, or a modern Race car...SA is the same. What differs is ...
Convergence...that's your accelerator...the pedal on the floorboard that makes you go faster, or slower! If you go too fast...you collide with the car in front of you! If you go too slow...you miss squeezing into the slot you saw! If you judge everything just right...you get the slot!
Questions:
How far ahead of you did you see the slot?
How many cars were in front of you?
How many cars in front of you were looking at the same slot?
How far ahead of you is the slot?
How much time do you have to make a positive decision?
Are you confident you can make the move?
Like the accelerator on a car...convergence has its limitations...you can stomp on it and hope for the best (600 yds)...or...you can keep your foot above the accelerator and wait... (200 yds)... and manuver for the shot.
How well do you Drive?
How well do you Fly?
Is this post confusing? Probably...
My .50 Cal Convergence is set for me to kill Bombers and Fighters...
Remeber...there are Big Trucks on the Freeways as well as cars...
My Convergence...6 x .50s....275
Knowing when to shoot comes with a bit of experience...just like knowing when to slide your car into the slot you've eyed.