I'm back on the newest experimental build, but this likely applies to the other builds I've been on. Shooting at point blank range, with pistols and shotguns particularly, can lead to some devastatingly bad results for your troops, especially when the best hit chance I tend to see with a pistol at point blank range is a few ticks over 50%, and with a shotgun around 70%.
Just today I'm on my first mission out with some newbs and we've blasted through all but two pockets of the map, where we figure the last alien(s) are lurking. So my assault troop with the shotgun is the first to discover the last alien ... bonus, it has its back turned to him, and he's got enough AP left to get right behind it and pull the trigger for the better of the two shot options .... well, two out of three of those shots somehow miss, and all he's done is piss off the alien and let it know he's there. No one else is even within grenade distance so I tell him, "well, you dumb bastich, you're dead now, it's not going to miss you, standing there in hand-shaking distance." Sure enough, the alien fires point blank at my stupefied nitwit ... takes two shots, but it's on point with both, and there goes my first casualty of the mission. A full turn goes by before I have the rest lined up ... sniper is next closest ... she misses and earns a ticket for a month eating hospital jello as a result. Rifleman then trots right up alongside the alien and instead of high-fiving it, fires a pistol right at it, which also misses ....
About this time, I just say "@#$! it" and have the next closest person lob a grenade in from the other side, which finally seals the deal.
If my chances to hit were in the 90% range at point blank and I still missed, I'd at least know to blame RNGeebus for my rotten luck, but at the moment I'm left to puzzle why my chances of hitting were so low .... especially the dummy with the shotgun hitting from behind at point blank range. There shouldn't have been anything left of that alien but enough giblets to fill the gravy boat.
Yeah, they're newbs, but still ...