Gabe
Are you asking Boyd to open that rule book up for his enlightenment or to actually post the rule because NBRSA short range clearly states the forearm “should” be flat or convex and not more than 3 inches wide. That’s somewhat cloudy because of the word “Should” but I’d live with the use of “must” in this rule.
IBS states the forearm “will” be flat or convex and no more than three inches wide inclusive of stock tape.
In IBS Hunter the stock “must” be convex and not more than 2.25 inches wide. I once asked at the IBS winter meeting for a definition of “convex” and was told the earth is convex.
For a while the SE Region of NBRSA had a Bob Dodd built gage for measuring that 3 inch forearm and I spent one Friday evening in Greenville, Alabama cooking the stock tape off my LV rig because it made the forearm too wide.
The rules of NBRSA clearly state the method for measuring the butt stock drop measurement. It states the drop shall be measured by the use of a rod guide and cleaning rod sticking out the rear of the action and measuring down from that rod to the bottom of the vertical drop of the butt. Kelbly built a jib for measuring that angle and Howie Bond and referee Buddy Ross (I think) called competitors up to be tested at the Shamrock at MGGOA. I and Joe Krupa went up as called with our rifles, rod guide, and rod for the obligatory measurement. When told to place my rifle in the jig I refused (OH, I also had my rule book with me). I told them if I have to abide by the rules, so do they and that jig isn’t in the rule book. I won that argument and Joe Krupa said if Francis doesn’t use the jig, either do I. I won that that argument but referee Buddy Ross called me up for a weigh in before every match that morning. He couldn’t believe my anemic LV Metric stocked LV weighed 9 pounds 9 ounces and he was being a disgruntled and vanquished pain in the ass.