Can someone please explain to me or give me link to read up on why when loading rifle bullets with a gas check must you keep it under 2000 fps? Enlighten me please? I have heard this ever since I can remember and can't seem to find the answer.
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Loading with cast bullets.
- Thread starter Tinyrebel
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I know it has to do with leading but not the details
posted watch thread
posted watch thread
Actually you need the gas check over 2000 not under. provides a solid base that won't deform under the pressure which should help with accuracy and reduce blow by.
The cast I load is pretty hard , not for hunting, and are for pistol so no worries about needing a gas check.
The cast I load is pretty hard , not for hunting, and are for pistol so no worries about needing a gas check.
Im not using for hunting either. Just plinking. I also load cast for pistol and dont have the need to gas check those either. So there is no other reason for keeping lead under 2000? As long as a gas check is used there is no other issues at the faster speeds?
After reviewing some forums it seems depending on hardness you need them in the over 1200- 1500
They say pushing lead past 2200 the accuracy suffers compared to jacketed
but that is just forums consensus
They say pushing lead past 2200 the accuracy suffers compared to jacketed
but that is just forums consensus
Just reading some old-time Gun Digest reloading articles, and they talk about this a lot.
According to those, as you increase speed (via more or longer pressure) you expose the lead base to higher temps for longer durations, resulting in partial melting of the bullet. The gas-check will help raise that temp some by insulating the base, but not 100%
As a few folks mentioned, you can compensate by using a harder lead alloy, but that only works up to a point as well. At some point you just have to start using jacketed bullets.
According to those, as you increase speed (via more or longer pressure) you expose the lead base to higher temps for longer durations, resulting in partial melting of the bullet. The gas-check will help raise that temp some by insulating the base, but not 100%
As a few folks mentioned, you can compensate by using a harder lead alloy, but that only works up to a point as well. At some point you just have to start using jacketed bullets.
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