This sounds like " Notching " your pistol grips for every guy a gunfighter shoots down. It came right out of the old west dime novels, and was not done by real gunfighters. No one needed to brag about their kills, nor found it worth while to telegraph their business to others. Too many relatives of the victims would be willing to shoot these gunfighters down in the street with a rifle or shotgun, fired at their backs. Remember that Jack McCall, who shot Wild Bill Hickok in the back of the head in Deadwood, S. Dakota, in 1876 was first " tried " in a miner's court, and was released when he claimed he was just avenging Hickok's murder of his brother. When those facts were found to be a total lie, he was arrested again, indicted,tried, convicted and hanged.
Indians use taks to adorn their gunstocks. Sometimes the tacks would be of their clan, or even a picture word of their name. Other times, it was a religious symbol. I once held an 1873 Winchester that was tacked by an Indian Police officer in Oklahoma, and the tacks were merely decorative, and held no symbolism.
I like the idea of carving, or inlaying an image of the animal you hunt, and then use something else to indicate the number of them taken, if you must. Tacks for that purpose are just, well " tacky". :rotf: