These are our crimp on aluminum .30 / 7.62 mm caliber gas checks. They are made with .015 thick aluminum, so they work very well when sized .309 to .312. We are selling these direct, cut out the middle men and buy right off the press. Made to fit tight on a .284 shank.
Our 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 4 quantities: 100 for $3.99, 250 for $6.75, 500 for $12.50 and 1000 for $23.00
Prefer copper/gilding brass .30 Cal gas checks?
Click here for our in house made premium line .30/7.62 mm caliber gas checks: .30 / 7.62 mm Caliber .017 Copper Gas Checks
Showing reviews 1-10 of 47 | Next
Posted by Unknown on Nov 23rd 2023
I recently found a cigar box full of .30 cal 200 gr cast bullets and was curious if this would be something that I would want to invest in. I found these aluminum gas checks at a good price and decided to give them a try. They worked just as expected and that's all that I can ask of it. I would buy them again!
Posted by Ed on Apr 1st 2023
Mr Sage recommended these when I had a problem with one mold that made slightly oversize shanks. They fit perfectly and stayed mounted. They enabled me to continue using the mold instead of sending it back to the maker.
Posted by Ken H. on Jan 1st 2023
I have used many thousand of Sage's gas checks and find the quality of this product unmatched.
Laus Deo, Ken H.
Posted by Dave on Dec 27th 2022
You can't go wrong with this gas checks. Great value fast service.
Posted by terry on Aug 25th 2022
I have used about 10000 of these and not 1 was bad, also I have used about the same number of Sages CU checks with equal results
Posted by Richard Thompson on Jun 20th 2022
I was very surprised how well the aluminum gas checks worked on my 32/20 bullets in my Blackhawk Buckeye. I've always just used copper in the past but decided to try the aluminum & they worked great, thanks for a great product.
Posted by Unknown on Apr 24th 2022
Yours shoot as well or better than any other vendors gas checks.
Posted by Lance J Hale on Apr 13th 2022
Been using these for years with the Lee .30 caliber bullets. They fit great and cost less than others. Also, there is no need to use a separate crimping tool, they crimp in place just by running them through the sizing die as normal.
Posted by guzma393 on Jan 20th 2022
Bought over 5k+ of these gas checks and they installed and crimped on no problem on the heel of a powder coated lee .312" 160 grain cast bullet using the lee .311 sizing die. Works great with sizing with the .309 sizing die as well. I've ran these in semi-autos, and clocking them 2000+ fps using WW lead/range scrap hardness lead with decent accuracy and no leading. Well worth it!
When sizing, ~.004"+ under, I noticed a bit of flashing being produced around the checks, but they don't seem to affect performance. To alleviate this, I either size and gas check in two steps (i.e. pass through .311 then .309) or apply a tad bit of case lube so the cast will pass through the sizer a bit easier. This is by no means a problem with the gas checks themselves.
Posted by terry on Jul 10th 2021
love these, this is my second order and there will be a third soon. I put these on reduced loads military rifles, Arisaka, Mosin-Nagant and Krag. But I use the copper ones in 32 caliber, because not made yet. I use all Lee molds.
Showing reviews 1-10 of 47 | Next
All prices are in USD.