Bingley... yes... the .22 or other sub caliber projectile would not touch the original shotgun barrel, and be directed by the rifled insert barrel, and dependent on its quality of construction... I've never shot one, but should be as accurate as any short barrel pistol barrel...... I'm primarily a competition shooter and not a hunter.. most of my firearms are pretty game specific... I shoot a lot of 3 gun when possible, which is rifle, pistol, and shotgun... I did install a .22lr adapter for my AR15, and was very unhappy with the accuracy of shooting a .22lr projectile through a .223 diameter barrel with a fast twist rate to the rifling...I got no better than 3" groups at 50m.... I built a dedicated .22lr upper with correct twist rate and no chamber jump... the groups dropped to less than 1/2" at 50m... which is the limit of my old eyes and the 1.5x16 ACOG I use for a sight