Another one defeated by the Grand Yosh himself (I'm still tryin at that Bribe-a-Yosh program

)
On a more serious note, the FP was never really 2-shot-able. And trust me, I used to play poundamonium often, and as a support at that. And it took 2 double-barrel blasts. I think it might have been one if you planted it into it's head, but I remember aiming for the chest in order to penetrate to the FPs behind the front line.
So maybe it's just that you were playing Beginner and headshotting it?
And, by the way, the SS is not diminished by the loss of the m14. Just try the crossbow. Or the lever action rifle. Both are pretty deadly and powerful weapons. The xbow can be used to kill off FPs reliably even as a medic!