Here are my three tubes. All winchesters. The 63, 1890, and dads old 61. The 63 has a tube in the butt stock, the 1890 was 22 WRF that I had rechambered to shoot 22 WMRF, Dad bought the 61 in the late 1930s. It is in 22 LR, and has the rare octogon barrel. He was 6 ft 5"s and lengthend all his stocks. I learned to shoot on that gun.