New For 2018! We now have extra tall copper .303 gas checks
These are our unique .303 caliber copper gas checks made using .017 thick gilding brass, also known as 210 copper. Made for a normal .284 shank bullet, these are extra deep for long shanks. The .303 gas checks are about .010 taller than our regular .30's.
The checks are sold in resealable clear plastic bags. Shipping is based on each item's weight. USPS postage rates are calculated in the shopping cart. USPS flat rate boxes and First Class mail are used to reduce shipping cost. Most orders ship in one business day Monday - Friday.
Sold in 3 quantities: 250 for $8.25, 500 for $14.50 and 1000 are only $25.00.
Our regular .017 .30 caliber gas checks are here: .30 / 7.62 mm Caliber .017 Copper Gas Checks
If you need an easy to size .308 to .314 gas check, we suggest our aluminum .30's made from .015 thick material here: .30 /.308 / 7.62mm Caliber Aluminum Gas Checks
Posted by doug lundy on Oct 9th 2018
They work fine but initialally they went on the bullet shank a little loose on a mold from accurate molds. But after sizing they were good and tight . Maybe a little more research on the better mold manufacturers shank diameters could tighten things up a little bit. That being said i know manufactuing specs for different alloys producing consistant shank diameters is problematic. All in all it worked for me. Louie.
Shamus: they have a .283 cup size for a tight fit, your shanks should be at least .284.
All prices are in USD.