Well not really. If Topsy's trying to 4+ autogun a power-armoured model (which he most likely does as a GSC player) he statistically does 0 damage on average. GSC are tough to start with in KT21 - they're not necessarily bad (it's still too early to be certain), but they definitely have a high skillcap, which doesn't help at the start.Previously most shots did absolutely no damage. Now crappy guns/attacks at least do chip damage, which feels more satisfying.
I'd recommend trying something simpler - Power Armoured Transhumans of your favourite variety tend to do reasonably well for a start, or maybe the Tyranids, considering what you already have @TopsyKretts.