The Jackie Brown Carolina smoothbore i recently got appears to have straight rifling in the bore. I can feel the lands and grooves with my finger and see them going all the way from the muzzle to the breechplug face. Is this going to have any effect on shooting rd. balls or shot? Is this normal for his guns? Have never had a smoothbore with this before. The rifling isn't very deep, maybe .002-003 best i can tell by looking at it. Any info on this would be appreciated. Thanks.