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- new brunswick
how do you make 22-284 brass?
making 22-284 brass?
- Thread starter firsttimer
- Start date
Run 284 brass through a 22/284 full length die, you may want to do it in 2 steps, first run it through a 25-6.5 neck sizing die. You will also have to turn the necks, as the brass may be to thick after. I have run 308 through a 243 die in 1 pass without any problems, you may get away with one pass.
Hope you have a good supply of cheap barrels.
This is a common misconception. Barrel life will be short only if you load it hot. High temperature associated with high pressure is what torches barrels, not high velocity.
A 22-284 loaded to 50,000 psi will have longer barrel life than a 22-250 loaded to 55,000.
Ted
Accurate Barrel Life from http://accurateshooter.net/Blog/barrellifeupdate.xls
Bullet Dia [in] 0.223
Loaded Powder [gr] 51.5
Powder Heat Potentioal [KJ/Kg] 3630 (Used H1000 as powder)
Pressure [Psi]
Molly Coated [Y/N] N
Total 1055 Rounds
1000 round barrel life is a definite barrel burner.
Found the H1000 load online with a 3450 FPS with 80gr SMK
Dunno why anyone would want to burn that much powder to send a .22cal bullet down range but to each their own.
Bullet Dia [in] 0.223
Loaded Powder [gr] 51.5
Powder Heat Potentioal [KJ/Kg] 3630 (Used H1000 as powder)
Pressure [Psi]
Molly Coated [Y/N] N
Total 1055 Rounds
1000 round barrel life is a definite barrel burner.
Found the H1000 load online with a 3450 FPS with 80gr SMK
Dunno why anyone would want to burn that much powder to send a .22cal bullet down range but to each their own.
Last edited:
- Location
- new brunswick
i thought when i was researching i seen that 22-284 brass could be formed with 22-250 dies to neck down to 22 then fire formed
Not even close. 22-250 is a lot shorter and skinnier, the only brass you can use is 6.5-284 or 284win. Look at reloading manual a lot of useful info in there. You have a reloading manual don't you?
A bushing die could be used to take 6.5-.284 cases down to 6mm, then on to .22. Whether neck turning or reaming would be necessary would depend on neck diameter with a seated bullet. If the reamer is being custom ordered, adjusting neck diameter would not be an issue. The reamer could be ground to allow unaltered case necks.
Why not - How would the velocity of a bullet fired with a .22-.284 @ 50k compare with the velocity of the same bullet from a .22-.250 @ 55k? Loading down the larger case seems to be sort of contrary, given that the whole point of the larger case is to maximize velocity.
Why not - How would the velocity of a bullet fired with a .22-.284 @ 50k compare with the velocity of the same bullet from a .22-.250 @ 55k? Loading down the larger case seems to be sort of contrary, given that the whole point of the larger case is to maximize velocity.
Firsttimer - This is what's written in P.O. Ackleys book regarding 22-284.
Some individual rifles have produced extremely high velocities. However, when a special
rifle was made and chambered first for the 220 Swift and subsequently chambered for
the 22-284 no increase in velocity was possible. However in order to equal Swift
velocities, it is necessary to use considerably more powder which necessarily results in
shorter barrel life.
I doubt your factory barrel is going to have a slow enough twist to give you much barrel
life. If I was you I'd look at a 220 Swift or 22-243. At least reamers and dies are much
more available and you can maybe run 55gr bullets and get some barrel life.
Some individual rifles have produced extremely high velocities. However, when a special
rifle was made and chambered first for the 220 Swift and subsequently chambered for
the 22-284 no increase in velocity was possible. However in order to equal Swift
velocities, it is necessary to use considerably more powder which necessarily results in
shorter barrel life.
I doubt your factory barrel is going to have a slow enough twist to give you much barrel
life. If I was you I'd look at a 220 Swift or 22-243. At least reamers and dies are much
more available and you can maybe run 55gr bullets and get some barrel life.
Because P.O. Ackley said? Whatever he might have said, was said at least 40 years ago, well before several powders were available that allow a 22-284 to provide much higher velocity than a 22-250 or a 220 Swift.
Whenever someone asks about a chambering that isn't "effecient", out come the warnings of short barrel life and excessive use of powder. Not everyone wants a 22LR, or 223 or other "efficient" chambering that provides for thousands of rounds of accurate barrel life. If you want or need 4000+ fps then a 223 won't do it. Get what you want - by the time the barrel is shot out, you'd be wanting something else anyways.
As in everything there comes first diminishing return, then no return. The 22/284 is such an animal. For yr. we shot the 22 Cheetah, basically an improved Middlestead. To get a small velocity increase over the 22-250 Ackley you needed to increase both poweder charge and barrel length. Powder only didn't do anything. Win. 785 and 34" barrel was the best combo back then, however 60 gr. was about the longest bullet avail.
A 24" barrel and a 22-284 case full of H1000 or 869 will have some serious muzzle flash, also the danger of unburned powder plugging the case mouth causing serious problems.
I had a 240 Gibbs that we were trying to get a 70 gr. bullet to 4400. Finally blew it up, and the consensus was a plugged case mouth, using a ball powder.
It is my guess that the 22-250 Ackley is about max from a .22 barrel, any more powder won't do much for you. YMMV. Mark
A 24" barrel and a 22-284 case full of H1000 or 869 will have some serious muzzle flash, also the danger of unburned powder plugging the case mouth causing serious problems.
I had a 240 Gibbs that we were trying to get a 70 gr. bullet to 4400. Finally blew it up, and the consensus was a plugged case mouth, using a ball powder.
It is my guess that the 22-250 Ackley is about max from a .22 barrel, any more powder won't do much for you. YMMV. Mark
If the OP hasn't already got his brass, I would recommend only using virgin brass, and I think I'd be much more inclined to use Norma or Lapua brand in 6.5-284, just to save a bit of working on your necks.
Oh, and make sure that the neck/shoulder area is lubed, don't worry about a few minor oil-dents, they'll blow out.
Oh, and make sure that the neck/shoulder area is lubed, don't worry about a few minor oil-dents, they'll blow out.
The restriction in days past (40+ years ago when Ackley was writing) was that there weren't any powders that could make full use of the larger capacity of the 22-284, i.e. a full case at max pressure for all bullet weights. There were however, powders like that for the smaller cases (e.g. the 22-250 and 220 Swift), such as H4831, which 40 years ago was considered a very slow powder. Those new powders like H870, US869, H50BMG, Retumbo, H1000, Re25, etc. do provide for velocity increases in the 22-250 and 220 Swift with the heavier bullets, but a larger capacity case like the 22-284 will always be able to outrun a smaller one regardless of bullet weight, but especially with the heavier bullets.
The notion of "overbore", when it means that a powder does not exist that fills the case for heavy bullets at max pressure, no longer exists now that powders like 20N29, US869 and Re50 are on the market.
Ackley had access to all surplus poders of the post WW2 era. Slow powders are only 1 piece , bore diameter and length are 2 more. A .22 barrel hasn't got enough cubic in. of space (burn and expansion) area to burn a 'slow' powder like 869 or BMG, even if 30+ in. long. I have worked with this a lot and can say 'it just won't work' here in the real world. You may find a powder-bullet combo that gets the speed you want, but it will not be consistant, and the danger of hangfire increases as powder charge goes up.
We even tried to 'double base' powder by putting 5 gr. of 700x on the primer then filling case with 785. This cut down the hangfires but didn't cure erratic mv. Mark
We even tried to 'double base' powder by putting 5 gr. of 700x on the primer then filling case with 785. This cut down the hangfires but didn't cure erratic mv. Mark
A friend of mine in Texas that shoots for the US National F Class team used to shoot a
22-6mm. Here's his reply when I asked about barrel life.
"About 450 - 500 and it went away fast. I was launching 80 gr match kings 3400 to
3600 but once the throat started fire cracking it would blow bullets up and you never
knew when you would see the blue cloud."
22-6mm. Here's his reply when I asked about barrel life.
"About 450 - 500 and it went away fast. I was launching 80 gr match kings 3400 to
3600 but once the throat started fire cracking it would blow bullets up and you never
knew when you would see the blue cloud."
