Am thinking of going from a 26" barrel to a 21" barrel on my MI Super 90 to keep from getting hung up on every low hanging branch in the woods. Have a Tru-Glow Turkey Choke which adds another 1 1/4". Will this combinaton still deliver a tight pattern at 40 yds? The barrel is almost $300 so it would be an expesive experiment if it dosn't work. Comments would be welcomed.