noticed the same with sniping when starting out, it's usually a 2 shot kill until you unlock magnum ammo. (even with a headshot) at least it was for me, i was like this gun probably just sucks, but once you unlock magnum ammo, most guns are pretty good.
it's easiest to level up with the medic in the beginning. and i only use engies on levels that are vehicle heavy. i stopped using the gustav and have found a love for mines rofl
Of the four bolt action sniper rifles, all but the SV98 will kill even a 100% healthy armor perked player with a
single headshot at the max distance/minimum damage...
without magnum ammo. If it was taking you two "headshots" with the M24/GOL/M95, you simply weren't hitting the head on the first shot.
In fact, magnum is actually a pretty silly perk for bolt action snipers to be messing with, because it should always be 2 shots if you miss the head...unless you're doing something funky and playing an assault sniper with a bolt action...then magnum can help extend the range of your one-shot-kill with torso shots (again, all 4 bolt action rifles can do 100 damage
without magnum ammo at close range. Magnum extends that damage to 125, so the distance before the damage drops below 100 is extended out). And thus I'll generally go with something like the explosive perk to help my mortar strikes, or I'd choose spotting scope if it wasn't broken