Your question has probably not been answered because the serial number 72xxx was made in about 1930 BUT the Sport Model Woodsman with 4.5" barrel did not make its appearance on the market until 1933 around serial number 86000. So this needs some clarification from you before an intelligent answer can be given.. It is quite possible that the original 6.625" barrel was shortened or re-barreled with a short barrel and the gun was not made as an original Sport Model Woodsman. The phrase "early knurling pattern" indicates that the gun has had the barrel replaced. If by knurling you mean the checkered area on the backstrap, then for sure you have a re-barreled gun because all Woodsman Sport Models were made with horizontal, parallel lines on the upper backstrap so the gun cannot possibly be an original Sport Model. Most important is the need to supply a detailed description of the condition of the gun, especially the amount of original factory blue finish. The value range can be as much as $1,000. depending on the amount of ORIGINAL factory blue finish remaining. If you want to email some good clear photos fothe gun and its stampings I may be able to give you an accurate evaluation. But with the information given , no practical figure can be arrived at. Please feel free to contact me. Don Schimpff Redding, CA guncollector@msn.com
Plug Race or Dash for Cash
Three bars
Pattern is dictated by the amount of choke on the barrel(s)
the figure eight
A shorter barrel creates a wider shot pattern.
The pattern for barrel racing is simple, and goes like this: 1. leave the starting gate and head towards the far side of the barrel to the right. 2. go around the barrel to the right and head up the the right side of the barrel that was to the left of the starting gate. 3. go around this barrel to the left, then head up to the right side of the point of the triangle and go around to the left. 4. race to the finish line!
Barrel racing got its start with the Women's Professional Rodeo Association in 1948, in Texas. The course was originally a figure-eight pattern, but was replaced with the more difficult clover leaf pattern.
Firing lead shot through a slug barrel will not damage the barrel. The rifling will distort the shot pattern and you will get less than desireable results.
Maison
the barrel is narrowed at the muzel for a tighter shot pattern.
the left barrel shoots a tighter pattern than the right side
the barrel is constricted at the end to make the pattern of shot flow density wider or tighter. Usually from cylinder up to full choke