- I didn't have any particular application in mind - but thought that they "might come in handy".
These things are designed to be crimped in place to the base of projectiles to protect from the gas-cutting action of the high pressure burning powder on cast lead pills when driven hard:
- Although bear in mind that the latest anti-gun study is that lead bullet fragments & residue in the meat of hunted animals will cause lead poisoning .. particularly in young people.
Guys with brains should be focusing on making better ammunition WITHOUT LEAD .. What's wrong with solid copper? - then we could boast that our bullets are both 'lead free' and anti-bacterial. 😊.____________
Hornady seem to be the main source for gas-checks - but you might be able to find a die set kit to stamp-out your own gas checks from sheet aluminum beer or soda cans (or aluminium as we poms were taught at school).
I keep looking at that wee baggie and scheming for duplex / triplex or 'buck'n'ball' loads for my 327 Fed. Magnum with the gas-check used between the powder and balls or shot.
I'll do it 😄