I'll let you in on another secret of the seasoned paintballers .....
Yes, out guns are better because we take care of our own guns and maintain them, they cost 10 times (or more) than the rentals that you get, we agonize other advanced barrels - one piece vs two piece, carbon fibre, bore sizing, rifling, we bore match, over bore, under bore, fine tune efficiency, optimize velocity (even reduce velocity for a straighter shot), use top tournament paintballs, or go one grade down and let the fools break their overdraft for an elusive better ball.
However ....... Its a liquid filled ball, which no matter how perfectly formed has a join between two halves. No matter how straight we can make it fly it's ultimately going to curve - one side or the other or drop short
You rarely see a paintballers firing one shot at the opposition - they fire two or three, or a line. One of them should hit the mark, and burst
The one shot marksman either just got a lucky shot, or spent months in a field working out optimum adjustments and learning just how far they can predict a shot.
Which gives a clue - distance. The closer you get the less distance there is for the variables to pull the ball off target
In an open area you're fighting the wind, in the woods you have to get past trees and through long grass
Putting your money into extra paint lets you shoot more - and enjoy shooting them
Putting your money into a specific gun that you like the look or feel of makes you enjoy shooting it more
But get a little bit closer, get a little bit more adrenaline ......... See how much closer you can get ....... And get shot, then come back, and come closer and closer ...... And take your shot