Andy: You'll be playing at a penalty, as Str is reliant on melee hits and a Fighter is a melee class (the modifier goes towards melee accuracy rolling and also your class Move to destroy inanimate objects...) although you can get around the melee hits by choosing Versatile (gain a second range) as an element of your Signature Weapon and picking 'Reach' or even better 'Far' as your weapon's additional range. A longer range may detail a ranged attack included in your weapon and you use Dex to roll to hit for ranged attacks.