[Repeater-Builder] SWR Help....

[agrimm0034]

Installed a new 6.5 db gain antenna on the GMRS band 462.6 Transmit input is 40 
watts. LMR 400 ultra low loss cable is being used. Antenna is installed on 3 
legged style tower at 40 ft up. SWR reading is 2.5 - 1 ratio. Antenna calls for 
a DC ground for lightning protection and the tower is not grounded. If I ground 
the tower will it lower the swr on the antenna?