Theodore Roosevelt went on early taxidermy and natural studies as a young man. A sling shot, air rifle, or shotgun was just a tool of his trade. He even mounted and examined African animals when traveling with his own family as a young teenager.
Theodore Roosevelt had a dedicated gun room in the top of home at Sagamore Hill. He spoke frequently of practicing marksmanship with his children and grandchildren there.
He engaged in western hunts, manhunts, and ranching with his firearms in the 1880s. He special ordered a pair of Winchester ‘76s in .50-95. Used a SxS 10 gauge from his brother Elliot and a ‘74 Sharps in a .45 bore. These were stocked to suit him, customized w a half-stock and half-octagonal barrels that would have doubled the cost of the gun. The second expedition he orders a ‘73 Winchester in .32-20 and another ‘76 in .45-75.
We know the rest of his life with a focus on the Winchester ‘95s in .30-40 Krag and .405 Winchester. All those famous African safaris etc, he was likely the last true “gun nut” that lived his life to fulfill a personal desire and calling. Not a politician aspiring to fit a popular image crafted for him or by him.