204 Ruger Bo Case Length-headspace Gauge .450 Nitro Express - Scoring table for recording

- Scoring table for recording hits and values

precise distance marksmanship with close-in aiming speed

385m Beam Distance

optimizing target resolution

204 Ruger Bo Case Length-headspace Gauge .450 Nitro Express - Scoring table for recordingRifle Case Length Headspace Gauges To achieve the highest degree of safety and accuracy, Lyman recommends that all bottleneck rifle cases be inspected after resizing to ensure that the proper headspace dimension is maintained. The best way to check this critical dimension is with a Lyman case length headspace gauge. The reloader simply inserts the case into the gauge to insure that it does not exceed the maximum or fall below the minimum allowable