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Thread: Gas Checks

  1. #1

    Gas Checks

    Hi guys
    In process of buying a .22 hornet (cz527 American) and plan to reload for this and also cast my own bullets, have seen that some people use gas checks and it seems a good idea but I have no idea how to attach them to the base of the bullet, or are they put into the mold before casting ???
    Cheers
    Ray

  2. #2
    Usually fitted with 'lubrisizing' die or lee push through sizer.
    A young man who isn't a socialist hasn't got a heart; an old man who is a socialist hasn't got a head.
    I have summat for sale; here's the M̶i̶d̶w̶a̶y̶ Brownells UK price... effin jokers.
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  3. #3
    A young man who isn't a socialist hasn't got a heart; an old man who is a socialist hasn't got a head.
    I have summat for sale; here's the M̶i̶d̶w̶a̶y̶ Brownells UK price... effin jokers.
    "The .30-'06 is unstable at close range" - Ahahahahhahh!


  4. #4
    Saur90
    Thanksa lot for the video explains it perfectly
    Cheers
    Ray

  5. #5
    You have to use gas checks when the muzzle velocity gets to a point, around 1,700 to 1,800 fps.
    If you are just loading plinking rounds, like a .22 LR or .22 WMR, you don't need the gas checks.
    But you will need to lube and size the bullets if you want to tune accuracy.

    On the larger bores, like a .45-70 or .444, there are multiple sizing dies, and just a few thousandths of an inch can make the bullets just right for your cast loads, because of the bore and rifling differences among manufacturers, models, and years of production.

  6. #6
    I will respectfully disagree. That is an out-dated myth. Your need for gas checks is based on the pressure your cartridge generates compared to the yield strength of the alloy you are using. For example: There are some Hornet loads using Unique that can generate almost 40,000 psi but only give 1800 fps. Soft alloy would be bad, without a gascheck? Far worse! In truth, after 30 years of shooting small bore cast bullets, at all velocities between 22LR and 2850 fps, I can tell you that if the bullet has a gascheck shank, put a gas check on it. Accuracy is far better.~Muir

  7. #7
    I will take your word for that, as I have not shot any cast bullets below 7mm, so none at high pressure ( or velocity ). I did borrow a set of sizing dies to experiment with my .444 Marlin, and it did make a difference in accuracy, given the same load. But I just shoot 240 gr bullets at lower velocity, for fun and practice, and 265 and higher for hunting loads. I think the rifles I will probably be shooting cast bullets in the future mostly will be my 1888 Commission rifle, and some .303 Enfields which are 100 years old. The scarcity of proper jacketed bullets for my .22 Savage HP is almost enough to force me to try casting bullets for it, but I am on the lookout.

  8. #8
    Quote Originally Posted by Southern View Post
    I will take your word for that, as I have not shot any cast bullets below 7mm, so none at high pressure ( or velocity ). I did borrow a set of sizing dies to experiment with my .444 Marlin, and it did make a difference in accuracy, given the same load. But I just shoot 240 gr bullets at lower velocity, for fun and practice, and 265 and higher for hunting loads. I think the rifles I will probably be shooting cast bullets in the future mostly will be my 1888 Commission rifle, and some .303 Enfields which are 100 years old. The scarcity of proper jacketed bullets for my .22 Savage HP is almost enough to force me to try casting bullets for it, but I am on the lookout.
    I have, IIRC, an Ideal 58 grain, .229" RNGC mold if you want it, gratis. I was so frustrated with it when I needed .225" and got this behemoth bullet from an old Ideal mold. Just let me know. I have about 120 different molds... many of which just sit waiting for the proper gun!

    This is an old estate rifle I like to shoot. It's a "J" bore @ .320" and the 170 grain FP's at .322" shoot marvelously. ~Muir

  9. #9
    Quote Originally Posted by Muir View Post
    In truth, after 30 years of shooting small bore cast bullets, at all velocities between 22LR and 2850 fps, I can tell you that if the bullet has a gascheck shank, put a gas check on it. Accuracy is far better.~Muir
    I am currently using hard cast gas checked bullets in 9.3, 308, 7mm and .223. All are flat point designs which would do at a push for hunting (where legal) and make for inexpensive plinking and practice.

    I first looked into casting many years ago but got back into it a while back when supplies from America looked to be drying up a bit and thought self sufficiency would be the way forward (see Hugh Fearnley-Whittingstall!).

  10. #10
    Quote Originally Posted by VIGILAIRE View Post
    I am currently using hard cast gas checked bullets in 9.3, 308, 7mm and .223. All are flat point designs which would do at a push for hunting (where legal) and make for inexpensive plinking and practice.

    I first looked into casting many years ago but got back into it a while back when supplies from America looked to be drying up a bit and thought self sufficiency would be the way forward (see Hugh Fearnley-Whittingstall!).
    I'm sure you find it very satisfying. I do. I have several rifles I use only with cast bullets. Along with all the other attributes you mentioned, the light practice charges and lead bullets induce as much barrel wear as a 22LR. Very kind to your rifle.~Muir

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