Lyman Rifle Case Length Headspace Gauge .300 AAC Blackout 7832338. 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...
Lyman Rifle Case Length Headspace Gauge .300 AAC Blackout 7832338. 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...