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  • Sage's Outdoors .30 Caliber commercial quality copper gas checks.
  • Sage's .303 gas checks.

.30 (Tall) / .303 Caliber Copper Gas Checks

Out of stock

 Product Description

These are our extra tall copper .30/.303 caliber gas checks.


Made for long shank and large bullets like you would use with .303 British rifles. We use .017 thick copper for these. Made to fit tight on a .284 shank bullet, about .095 tall and will size all the way up to .317. The gas checks are sold in resealable clear plastic bags. USPS flat rate boxes and First Class mail are used to reduce shipping cost.


Sold in 3 quantities: 250 for $7.50, 500 for $14.00 and 1000 are only 26.00.


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 .309 to .312 gas check, we suggest our aluminum .30's made from .015 thick material here: .30 /.308 / 7.62mm Caliber Aluminum Gas Checks


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 Product Reviews

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  1. First time buyer 5 Star Review

    Posted by on Apr 16th 2021

    After waiting 6 months for them to become available, I finally received my gas checks. I can't say it was worth the time, but they weren't available anywhere else either. I have used Lyman and Hornady gas checks in the past and these are just as good and at a bargain price. I know where to go for my next gas checks.

  2. 303 tall checks for the 327 federal mag 5 Star Review

    Posted by on Jul 2nd 2019

    I use these checks on a 112 gr bullet from an accurate mold. Bullets are used in a 32 h&r mag and ruger 327 mag, sized at 314 they really grip the shank. Accuracy has been great.

  3. 303/7.62 .017 gas checks 4 Star Review

    Posted by 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.

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