They also tried to make their common scope mounts fit as many air rifles as possible, and therein lies todays lesson. They learned, for instance, that a standard 11mm dovetail can measure less than 9.5 mm or greater than 13.5 mmand anywhere in between Then there are rifles whose bases are different, such as the Beeman Kodiak and the FWB 121124127, which have cross-slots to accept half-round pins as a scope stop system.įrom that data, they started building their scope mounts to fit specialized situations. To measure the width between two dovetail grooves, one millimeter pins were inserted into the dovetails on either side and a dial caliper measured the distance between the sides of the two pins.For more than 6 months, I measured as many airgun dovetails as I could lay my hands on.įrom this data, B-Square compiled a list of scope groove dimensions for many models of air rifles. Since the one millimeter pin would only go into the grooves so far, we were always measuring the same way, regardless of the angle that was cut into the dovetail. The depth and the shape of the grooves matters a lot to the fit of the scope mount. You cannot simply measure from the sharp point on one side to the sharp point on the other side, because that will tell you nothing about the depth of the dovetail grooves. Physical description Bechtel told me we needed a standardized method of measuring dovetails, because how you measure them determines their width. I want to make it clear that I am only talking about straight airgun dovetails, not Weaver or Picatinny dovetails. He started this project because B-Square was encountering wide variations in the width of what the industry called an 11mm dovetail. Today, I want to talk about how the scope fits the rifle specifically, the width between the dovetails.īack in 1998, Dan Bechtel, the founder and then-owner of B-Square, enlisted my help in measuring the width of airgun dovetails. Through the benefit of those mistakes, I can discuss scoping with you. I make no claim to be an expert in this field, but I bet Ive made as many mistakes as anyone who ever scoped a gun. This subject is daunting to those who havent scoped an airgun yet and emotionally charged for many who have. There will be more to Chapter 1, Selecting a scope, but today I want to begin Chapter 2 on Scope mounts. Singles Happy End Rarity Download Prime Directive.
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