I have some suggestions
Might want to lable the 250-300 fps as muzzle velocity, as we all know, paintballs doesn't keep gpoing at 300 fps
And to explain the Flatline and Apex systems;
In flight, a wing is shaped as to allow the air flowing on top of the wing to travel faster than the air below the wing. Thanks to Bernoulli and his principal on fluids, we all know that faster fluids equates to less pressure.
Since the air on top of a wing is, again, traveling faster than the air on the bottom, the pressure on the bottom of the wing is higher than the pressure on the top of a wing, creating lift.
Now, how does all this fit into paintball?
The Flatline and Apex system all put backspin on the paintball. Since the paintball has a backwards rotation while in flight, the wind resistance on the bottom of the paintball is greater than on the top, so the air moves faster over the top of the paintball than the bottom, creating lift.
Now, why wouldn't everyone want this? Doesn't it make paintballs go farther?
Well, yes, it does make paintballs go farther, but because of the increased air resistance and the way the Flatline and Apex systems work, they may sometimes shoot at a slightly slower velocity (if using brittle paint and/or higher velocity, the barels may be too harsh on them, causing them to break), and because of the whole Beroulli's Principal thing, the paintball destabilizes in flight. And puff of crosswind could potentially knock the paintballs spinning axis off course, causing it to curve left or right. Also, at the extended range to recieve, you hardly get any paintballs to break on the people you hit.
A combination of those attributes causes most players to stay away from the Flatline and Apex barrels.
And to the above
Yes, you are splitting hairs, this is intended for the noob that is asking these questions, not the experiances paintballer and whatnot