You're kidding, right ? QF17 is shit. It misses like 50% of its shots, dies to a single incendiary grenade and costs 20 pop and 70 fuel. I'll take Pak 43 over this crap any day.
I've never seen a qf17 missing it's target, and the qf don't die to even 2 inciendary grenades (tested myself on the battlefield)