The Templar Military used a mix of Blaster/Laser based weapons and Ballistic weapons. Blasters and Lasers were used because their ammunition was readily available and they were quite effective within their envelope of usage. Ballistic weapons were used because most armor used in current conflicts were ineffective against them, and because the Templars produced their own ammunition at their Military Factories they didn't have to deal with the bloated prices of Slugthrower ammo. Not to mention that in combat against lightsaber wielding opponents, rapid firing slugthrowers were very effective, as the mass and inertia and sheer amount of rounds could overwhelm even a master at blocking blaster bolts.