Gun Turrets are completely immune and take no damage from artillery fire. Not sure if that has to do with Combat Mechanics Overhaul which I'm using. At least that's the only mod in arty's tooltip Base Mod > Combat Mechanics Overhaul.

It looks fine with Combat Mechanics Overhaul. May you post your save?

I'd like to but it's 1284 MB in size which will take an eternity with my internet. I can provide a list of my active mods:

{
  A_Total_Automization_Monarch_Fork = "0.2.12",
  ["Advanced-Drills"] = "1.0.2",
  ["Advanced-Electric-Revamped-v16"] = "0.6.11",
  AdvancedBelts = "2.0.3",
  Aircraft = "1.8.6",
  AreaPaste = "1.1.1",
  ArmouredBiters = "1.1.9",
  AsphaltPaving = "1.3.1",
  Automatic_Train_Painter = "1.2.0",
  Cold_biters = "1.1.4",
  Concretexture = "1.2.2",
  ["Constructron-Continued"] = "1.0.75",
  ["Craftable-vehicle-machine-gun"] = "0.1.0",
  DeadlockLargerLamp = "1.5.1",
  DragonIndustries = "1.152.1",
  EndgameCombat = "1.152.1",
  EvenDistributionLite = "1.2.1",
  EvenMoreTextPlates = "1.2.2",
  Explosive_biters = "2.0.5",
  FactorySearch = "1.10.13",
  ["Flow Control"] = "3.1.4",
  FluidMustFlow = "1.3.5",
  FluidWagonColorMask = "1.1.0",
  GUI_Unifyer = "1.12.0",
  Inserter_Config = "1.0.0",
  ["Kux-ZoomRunning"] = "2.1.5",
  ModuleInserterSimplified = "1.1.4",
  More_lategame_research = "0.2.1",
  No_Lab_Names = "1.0.0",
  Noxys_Extra_Settings_Info = "0.4.3",
  Noxys_Trees = "0.4.5",
  Noxys_Waterfill = "0.4.4",
  PipeVisualizer = "1.0.6",
  Placeables = "1.3.0",
  RateCalculator = "3.2.2",
  RealisticDecorationCleanup = "1.1.2",
  RecipeBook = "3.5.5",
  Repair_Turret = "1.0.3",
  Rich_Text_Helper = "0.4.10",
  SchallCircuitGroup = "1.1.0",
  SchallEntityInspector = "1.1.2",
  SchallTransportGroup = "1.1.0",
  ["Shortcuts-ick"] = "1.1.28",
  SpecializedFuelsSE = "0.1.1",
  StatsGui = "1.4.1",
  ["StatsGui-HandcraftTimer"] = "0.1.2",
  StorageTank2 = "1.0.0",
  Tapeline = "2.0.9",
  TaskList = "0.4.6",
  Toxic_biters = "1.0.2",
  TreefarmLite = "17.0.11",
  ["UltimateBelts_Owoshima_And_Pankeko-Mod"] = "1.1.0",
  UltimateResearchQueue = "1.0.12",
  Unit_Control = "0.3.11",
  VehicleSnap = "1.18.5",
  YARM = "0.9.13",
  ["aai-containers"] = "0.2.11",
  ["aai-industry"] = "0.5.20",
  ["aai-loaders"] = "0.1.4",
  ["aai-programmable-structures"] = "0.7.4",
  ["aai-programmable-vehicles"] = "0.7.24",
  ["aai-signal-transmission"] = "0.4.8",
  ["aai-signals"] = "0.6.1",
  ["aai-vehicles-chaingunner"] = "0.6.1",
  ["aai-vehicles-flame-tank"] = "0.5.1",
  ["aai-vehicles-flame-tumbler"] = "0.6.1",
  ["aai-vehicles-hauler"] = "0.6.1",
  ["aai-vehicles-laser-tank"] = "0.6.4",
  ["aai-vehicles-miner"] = "0.6.4",
  ["aai-vehicles-warden"] = "0.5.3",
  ["aai-zones"] = "0.6.4",
  ["alien-biomes"] = "0.6.8",
  ["alien-biomes-hr-terrain"] = "0.6.1",
  ["ammo-loader-Revise"] = "1.1.8002",
  ["artillery-bombardment-remote-reloaded"] = "1.2.0",
  ["auto-color-lamps"] = "0.0.4",
  autobuild = "0.5.7",
  base = "1.1.87",
  ["belt-visualizer"] = "1.2.5",
  ["bery0zas-pure-it"] = "0.3.0",
  betterCargoPlanes = "1.3.7",
  ["big-data-string"] = "1.0.1",
  ["blueprint-sandboxes"] = "1.16.3",
  ["calculator-ui"] = "1.1.1",
  ["combat-mechanics-overhaul"] = "0.6.24",
  ["creative-mod"] = "1.8.1",
  ["damage-numbers"] = "0.1.1",
  dana = "0.3.1",
  ["deadlock-beltboxes-loaders"] = "2.4.2",
  ["deep-storage-unit"] = "1.3.4",
  enemyracemanager = "1.17.4",
  enemyracemanager_assets = "1.0.1",
  ["equipment-gantry"] = "0.1.5",
  erm_marspeople = "1.2.0",
  erm_redarmy = "1.7.0",
  erm_toss = "1.19.0",
  erm_zerg_high_res = "1.0.0",
  expandtooltip = "1.1.3",
  ["extra-storage-tank-minibuffer"] = "0.1.4",
  ["factorio-codex"] = "0.0.20",
  factoryplanner = "1.1.70",
  ["flare-stack-plus"] = "1.0.0",
  flib = "0.12.9",
  ["fluid-memory-storage"] = "1.4.6",
  helmod = "0.12.18",
  ["hl-Rocket-turret"] = "0.1.2",
  holographic_signs = "1.2.0",
  informatron = "0.3.4",
  ["inventory-repair"] = "19.1.0",
  ["item-network"] = "0.3.4",
  jetpack = "0.3.13",
  ["k2-flare-stack"] = "1.0.0",
  ["lex-aircraft"] = "1.1.1",
  ["lex-aircraft-high-res"] = "0.0.3",
  liborio = "1.1.1",
  ["light-overhaul"] = "0.1.3",
  ["lossless-reactor"] = "1.0.1",
  ["melodys-lamps"] = "1.0.0",
  minigun = "1.0.2",
  ["nicefill-scriptfix"] = "0.1.21",
  nightvision_progression = "1.0.3",
  ["no-nuke-scorch-redux"] = "0.9.0",
  ["original-music-hd-reloaded"] = "1.1.3",
  ["production-analyst"] = "1.1.9",
  ["reverse-factory"] = "8.1.17",
  ["rewire-tool"] = "0.0.8",
  robot_attrition = "0.5.15",
  ["rocket-log"] = "1.1.11",
  ["sapling-capsule"] = "1.1.1",
  ["se-space-trains"] = "0.1.12",
  ["se-spaceship-trip-fuel-consumption"] = "1.0.4",
  ["se-there-are-still-hostiles-detected"] = "1.0.1",
  ["shield-projector"] = "0.1.6",
  simhelper = "1.1.4",
  ["solar-calc"] = "0.3.11",
  ["some-luaconsole"] = "1.1.3",
  ["space-exploration"] = "0.6.108",
  ["space-exploration-graphics"] = "0.6.15",
  ["space-exploration-graphics-2"] = "0.6.1",
  ["space-exploration-graphics-3"] = "0.6.2",
  ["space-exploration-graphics-4"] = "0.6.2",
  ["space-exploration-graphics-5"] = "0.6.1",
  ["space-exploration-menu-simulations"] = "0.6.8",
  ["space-exploration-postprocess"] = "0.6.26",
  ["space-exploration-scripts"] = "1.0.6",
  ["spidertron-extended"] = "0.3.15",
  statorio = "1.0.3",
  stdlib = "1.4.8",
  textplates = "0.6.10",
  ["tiny-production-ui"] = "1.1.1",
  ["train-log"] = "1.1.6",
  ["train-pubsub"] = "1.1.17",
  ["underground-pipe-pack"] = "1.1.2",
  ["vacuum-cleaner"] = "1.3.8",
  ["walkable-beacons"] = "20.2.4",
  zerm_postprocess = "1.1.0"
}

Can you make a new map with those mod enable? New map file size should be small. I need it to auto sync the mods. Thanks

Hi, I've restarted my current game and saved it right away with no changes.
ERM-mod-test.zip

By the way, is it possible to change the display names to something like Protoss/Zerg rather than erm_toss/erm_zerg etc. in the race manager window or is that intended for some reason?

1.7.1 should fix gun turret not taking damage.

Changing the display names: Yes, it's possible. I can do that in the next ERM feature release. That list is showing code name and dont have a proper label name.

So it was caused by Endgame Combat's artillery override. But the bug is on the gun turret.

P.S. Endgame combat's artillery projectile (150K damage) one shots everyone on my test map. It's more OP than nuke. >.>

Oh yeah, you might wanna turn up the heat a bit.
I'm playing here with ERM set to 20x strength, which is a solid match for Endgame Combat.

lol. That makes sense then.