Store Store/ Case Gauge Blocks45 Colt 100 Round Case Gauge$135.00 Add More Add to BagGo to CheckoutProduct Details45 Colt 100 Round Case Gauge. Check 100 at a time! Look for high primers or rounds that may jam in rifle. Save yourself from a match Trainwreck! 😉 RED ONLY. Show MoreSave this product for later Favorite Favorited View FavoritesShare this product with your friendsShareSharePin it45 Colt 100 Round Case Gauge