Because double tapping is for lesser calibers.

There were already a few Deagle rebalance mods, but personally I don't want our classic big-boy pistol to pierce armor or shields. I just wanted an upgrade in firepower, from the 120 damage class up to the 180 class reserved for the revolvers and the Parabellum.
This reworked Deagle deals 180 base damage, has slightly nerfed accuracy (68 down from 76), mag capacity down to 7 from 10 (extended mag now only grants 3 extra bullets, back up to 10) and ammo pickup has been normalized with other 180-damage pistols. Total ammo has also been reduced (down to just 49 from 60), and concealment has been knocked all the way down to a base of 20 (the same as the Matever - you won't be packing this one in your next low concealment build)

I may decide to change the balance up in the future, but that's only if there's a glaring oversight.
I recommend Frenzy/Berserker and High-Value Target to give yourself that real Counter-Strike one-shot one-kill feeling.

Special thanks to Boberbob's mod "Deagle 50AE", which I shamelessly modified to make this. I probably wouldn't have ever bothered if I didn't want a slightly more balanced version.