The straight rifled tube has been out of REM. cat. for 2 or more years but they are being closed out by several suppliers ,I think I saw it listed at Jerrys for $7.95 . I have 3 rem turkey tubes extra full, super full and the rifled super full , just got the rifled one back from a friend . I did some testing with Hevi shot reloads and the rifled tube was a little better with my gun .You have to try your choke with your shells ,all I can tell you is how it did in MY gun ,every gun /choke patterns a little different.