Yes, I'm aware of this and there is no way to disallow for that, but G.O.'s are high profile targets for *everyone*, not just the arty. There are many mentions of sniper fire as well--or "sharpshooters" who might be either real sharpshooters or simpley skirmishers. It stands to reason that sharpshooters would focus on them, but sharpshooters killed quite a few "Private Levi's" as well.

Another factor to keep in mind is that mounted officers were more likely to be struck by bullets than infantry anyway. Not only were they more exposed and higher value targets, but many "misses" were actually fired over the heads of the infantry. This would shift the balance in the other direction.

I can point to some battles were arty casualties were a high percentage. One of these is Carthage, Missouri. This was a light, early war, open field engagement. Of the 79 known casualties of the Missouri State Guard, 25 (32%) are attributed to Federal artillery fire (6 pounders) through first hand MSG accounts. This is of course not a complete representation of the casualties due to artillery in the battle as few of the other 54 are documented. Federal accounts of the action are less detailed, but their known killed and wounded was 50. Of these only the 3 wounded in the artillery battery can be for certain linked to the arty duel. A few wounded Federal infantry are listed as having been hit by gunshots, most wound/death causes are undocumented for the infantry, but several with wound descriptions sound like arty fire candidates. (1 MSG account also mentions two feet found in the Federal infantry position and their living owner nearby.)

Assaults against fixed fortifications like Helena, Arkansas; Arkansas Post, Arkansas; Pilot Knob, Missouri; Secessionville, South Carolina; Fort Wagner, South Carolina; etc. were bloody though small and featured artillery as the main source of destruction among the the attacking force. This is one reason I find the claims of overall artillery casualties being small rather suspect. Looking at these five examples alone of small battles amounts to 5,800 men lost in the assault force and the percentage wounded by artillery is undoubtedly quite high in each. My understanding is that the claim about artillery's relatively small contribution to K&W is from a single battlefield study at Gettysburg.