Winchester does make .38 S&W ammo or at least they did. It's a 145 grain lead round nose. It can be difficult to find and somewhat pricey. Even though it's a stright case, reloading can be tricky for two reasons. First it's a bit larger in diameter, approx. .36, compared to the .38Special/.357 magnum. Second, it uses a heeled bullet like the .22 where the ridge or shoulder of the bullet sits on the edge of the case mouth. Other than that it's a fun caliber to shoot.