A 22-284 Build....The Baboon Slayer...Done Now With Pics

c-fbmi

c-fbmi

BANNED
BANNED
BANNED
Rating - 98.6%
72   1   0
Location
Whitehorse and Boswell
Several here have asked me to start a new thread when I got around to rebarreling my 22-284 from an 8" twist to a 12" twist. I think I shall be doing this, this week..........So gentlemen, what would you like me to post and take photos of for this thread on this project.

The rifle is a 700 Rem short action stainless that was originally a new 243. I yanked the barrel and did some work to the action, I sent it to Dennis Sorensen (Guntech) to have the action trued and the lugs and bolt face squared. I installed a PT&G aluminum bolt shroud and speed lock kit. I changed the trigger to a 2 oz, 40X trigger adjusted to about 6 ounces. I put it into a Remington laminated thumbhole varmint stock and bedded it. It was showing promise with some 1/2" groups on the way up the test load scale, however it started vaporizing bullets before I reached any pressure signs, at between 3700-3800 fps. This caused me to rethink my choice of twist rates and decide to try a 1-12 barrel. The original barrel Bevan made for me from stainless and finished at 27", the new barrel is a 1-12" stainless Kreiger that will finish at 30".

I will unabashedly admit that my goal with this rifle is a consistent 1/2 MOA out to 500 mtrs and a muzzle velocity of 4000 fps with 80-90 gn match bullets...........I may achieve it, I may not, but the initial testing was looking good right up until the bullets exploded about 30 mtrs out from the muzzle. The new twist rate will give me an initial bullet RPM of 250,000, which should be enough to stabilize this bullet over it's entire super sonic flight trajectory. It should still be low enough to maintain bullet integrity. The 1-8 twist was causing bullet integrity breakdown at approximately 335,000 RPM and was displaying very good accuracy in the 250-300,000 RPM range. I also read 2 articles which said the 22-250 will stabilize the 80 gn Sierra (which is what I was using) down below 3200 fps in a 1-10 twist barrel, which works out to be 230,500 RPM. Assuming I can get at least 3800 fps, which the old 27" 1-8" barrel did, I will undoubtedly be within the stability RPM range of this bullet.

So there is the project goal and hardware list, now what would you gentlemen like to see posted..........
 
Last edited:
There is a Guns & Ammo Magazine article from August 1964 issue entitled “6000fps World’s Hottest .22!” by Bob Hutton where a 22-284 was used.... it's a screamer for sure lol
 
1899..........I have found excessive copper fouling with Barnes copper bullets at velocities in excess of 3500 fps. To the point of not being able to hit a target at 200 mtrs after as few as 16 rounds. My son experienced the same problems with both his 257 Roy and his 300 RUM. I only use them in larger bores under 3000 fps now.
 
c-fbmi said:
1899..........I have found excessive copper fouling with Barnes copper bullets at velocities in excess of 3500 fps. To the point of not being able to hit a target at 200 mtrs after as few as 16 rounds. My son experienced the same problems with both his 257 Roy and his 300 RUM. I only use them in larger bores under 3000 fps now.
Click to expand...

What if you moly-coated them? Berger's stability calculator says that even 1:8 and 4000fps is not fast enough to properly stabilize their 90gr bullet.
 
I'm certainly interested in it's peformance once completed.

Will it be finicky to tune?
Will it stabilize a 90?
Whats the throat look like after load development?
Velocity?

An accurate 4000 fps 80-90 bullet launched from a 22 cal is very interesting....to me anyway.

I ponder the 6mm-wsm and 115-117s sometimes as well.
 
Another thought might be to try the new Enduron technology powders with the monolithic bullets. IMR claims they contain "copper fouling elimination" technology, like that contained in CFE-223.
 
You guys obviously know what your talking about and I apologize for the derail but would it be possible to machine your own bullets out of whatever material then moly coat . Thanks
 
Ross Seyfried wrote an article about 10+years ago in Handloader about the 22-284. He also had bullets tearing themselves apart.

two bullets that Seyfried found that held together at hyper velocity / twist was the 60gr Nosler partition, which printed tiny groups at 4100 fps; and the Lost River Balistics 78 grain, which was the most accurate at just over 3700 fps

We may have even better bullet selections now in 2016. I probably have the magazine somewhere in my shed.
 
The goal is to drive a 80+ grn bullet with a BC over .500 at roughly 4000 fps. This would carry more energy than a 308 150 gn load throughout it's entire flight. It's wind capabilities are obvious with a BC exceeding .500, which is another consideration in this build. I do not necessarily agree with Berger as I have done the math and a 1-12 twist should work with 80+ gn bullets at 4000 fps. Possibly even with a 90 gn bullet, but that has yet to be tried.............
 
c-fbmi said:
WOW.........definite lack of interest here...........Okay then, I'll just carry on with my project..................
Click to expand...

I just found this thread and will be following with interest. I have a project on the go (well it's started, hope to get it by mid winter) of a 22-6.5x47. Your idea sounds intriguing as well.
 
Don't think there is a lack of interest. Your projects are beyond my scope of use or skill but like many others I will lurk and observe and learn something. I also don't generally post on such threads as I have nothing to offer of use:)

Fuzzy
 
The 23 cal project kinda got put on hold, let's just say it didn't die, it hibernated for a while, but I will be going ahead with the Penguin for sure. Marshal @ Matrix sold his business and sent me back my bullet dies, so at this moment I do not have a bullet maker for 23 cal bullets. I have found and been in contact with the gentleman who bought out Marshal and we'll see if we can get this back on track or not.

1899........Berger's calculator may say that, but I'm relatively certain that their bullets would not maintain their integrity any better than the Sierras at 335,000 RPM !!

Ah Ardent, barrels are cheap.........I'm fairly certain I'll go through more money in bullets and powder, before the throat is washed, than the value of a new barrel..........That's my yardstick. Nobody ever said hot rodding was cheap.........It should give similar throat life as the Swift or 6mm-284, both of which I got over 2000 rounds from and they were still shooting good.........well OK the Swift never did shoot that good, it was a Ruger, but after 2000 rounds it didn't shoot any worse.........then it became a 375-350 RM and restarted a useful life, and is still killing game in the Yukon today........
Anyway I have the mindset that when the cost of the barrel exceeds the cost of the components it takes to wash the throat out, given normal and reasonable shooting habits, then the cartridge is impractical........:d:d

G-W..........22X47.........isn't that, for all intents and purposes a twin to the 22-250 or maybe the AI?

So anyway, shortly here I will be heading up to my shop and throwing that Kreiger barrel in the lathe and the butchery shall begin..........the first thing I do is set the barrel up in the 4 jaw chuck running true and using the tailstock and live center I will cut the barrel shank to the correct diameter for the threads for a 700 Rem action, which is 1.050". But because this action has been trued, I'm going to cut them at 1.055" and thread and work from there. The thread step is .875" long to the shoulder, which I normally cut at about .85-.86" and then finish to exact length after the threads are done. Once the threading is good and the action screws on nice and snug, I will rechuck the barrel, just ahead of the threads and dial gauge it into the bore. Then I cut the barrel recess that 700s are all noted for, after which I shall chamber it. See, nothing to it really........I'm not as fast as a professional gunsmith, because I check everything several times as I go. It's not like I'm doing this all day, every day.
If I remember I'll take some photos of the process as I go.............
 
You must log in or register to reply here.
Back
Top Bottom