You've reached that conclusion because.....?
Depending on what your aiming at (town or base) and what direction your spawning in from, 7 1/2 miles isn't enough range to hit the target.
For example, on NDisles, if you spawn in from A1 heading towards V2, you would be out of range. If you drive much closer than your maxiumum range, you'll be under fire from their spawn heading toward V1.