6mm-22-250 cartridge? [Archive] - Varmints Den

: 6mm-22-250 cartridge?

12-24-2008, 10:39 PM

Anyone using the 6mm/22-250 cartridge?

Stumbled across an article on it in the October 2001 issue of Precision Shooting magazine. Gunsmith Fred Szablewski (Sabreco, Inc.) says it's a great choice for 600yd matches.
His 1/8 twist pushes a 107gr bullet at about 3025 fps.

Looks like a good candidate for long range coyote sniping.


12-25-2008, 12:14 AM
I've given some thought to that round from time to time, but would like to find some more info on it before I do one. I think running that round with a bullet in the 70 - 80gr neighborhood would be a great all around varmint rig, but then I look at each of the different rounds that will do better at each specific job.

Jim in Idaho
12-25-2008, 12:28 AM
I'm sniffing around that caliber also. Did some reasarch on the Tubbs 6XC today. Also want to look at the straight 6-250, as well as other 6mm cartrdiges based on the 250 Savage case. I'm not close to pulling the trigger on a new rifle though.

12-25-2008, 01:11 AM
I have the 6mm/22-250 at the top of my wildcat list for the following reasons.

1) Appears to be more efficient. Moves a 105/107gr bullet with 6 to 8 (approx.) grains less powder compared to the 6x47L or 6XC. Those cases are too close to a .243win for me. Barrel life, etc.

2) 22-250 brass is a lot cheaper than 6.5x47 lapua brass.

I'm just looking for a good long range (400yd to 600 yd) coyote cartridge that can buck some wind with low recoil and decent barrel life. Is that asking too much? He He

Jim in Idaho
12-25-2008, 02:16 AM
I'm with you on that, but I sure like the reduced taper of the Ackley cartridges. I'm thinking along the lines of 6 x 22-250AI. My want is for a bit more downrange energy for the lion I intend to eventually call in. I might could get by with the old 6 X47, or 6 x 45, too. Need to do more research. I don't care about ranges beyond 300 yards.

12-25-2008, 02:34 AM
A few of the coyotes I've been coming across are in the open flats where I can't get any closer. My .17rem is not the best for a 400yd+ shot. Even the .223 is pushing it, especially with a good winter wind blowing.

Time for a 6mm in the inventory....

12-25-2008, 06:35 AM
Lots of info on all of the cartridges mentioned above, over on 6BR.com

12-25-2008, 09:42 AM
6 mm-22-250 WHY??????? The 6mm -22-250 has a case capisity of 45.82 gr. of H2O and the .243 win. has a case capicity of 52.81 gr. of H2O. Why would you not go with the factory chamber when it is already faster with the same bullets. If your wanting a 6mm go with the 6 mm-284 or the 6mm-06. I personally like the .22 cal and built a .22-6mm. With 80 gr. .22 cal bullets at 3,250 and little to no wind I can shoot 2 in. groups at 600 yrds. I can push the 80 gr. bullets over 3,500. but best accuracy is at 3,250 fps. A couple of thing about Wildcat though, 1. dies will cost you around $ 100 2. You have to form your own brass befor you can start loading. 3. Wildcats ar harder to sell if your get tired of them. 4. There is little to no presure tested data for them. 5. You can have a round that no one else around has. :D

Jim in Idaho
12-25-2008, 10:17 AM
Well, it's not always about wringing the absolute maximum velocity out of a particular bullet, for one thing. If that's what you enjoy, have at it. There are a lot of reasons for the desire for a particular cartridge. All based on personal preference.

12-25-2008, 12:51 PM
It's a good cartridge. Shoots lighter bullets - 70gr and less - a bit slower than the .243 but not a whole bunch, with about 6-7gr less powder. We started fooling with it in the mid 90's. The idea was less powder burned for less barrel heat and copperfouling, for more shots between barrel cooldown and cleaning.....and still get near-243 performance. It does work. I have two and they're pleasant guns to shoot. The load is a 65gr bullet doing 3690. But making these guns shoot well took more time than with other chamberings. Just those guns, a couple friends used my reamer and had no problems finding accuracy. One friend did his highpower rifle and shot 107s (?) at something like 3200 or 3300 through a 30" barrel. Brass only lasted one firing and the primer pockets were gone so he backed off a couple 100fps.

The 6-250 is easy to make. One gun uses PMC 22-250 brass necked up, the other uses Win. 250Savage brass necked down and both work fine. They get performance not too far behind a .243, the repeater feeds perfectly. Should be good on coyotes but I wouldn't be using heavy LD bullets on them. However since coyote hunting isn't high volume shooting and fouling/barrel heat isn't a problem, I'd just stick with the .243 and not worry about it. Where a repeater isn't necessary - as in prairie dogs - now I'd go with a 6BR which burns quite a bit less powder than the 6-250 but has not that much less velocity.

12-26-2008, 11:02 AM
Somebody is using it here in Albuquerque. I find necked up .22-250 brass at the range the first thing I think of is coyotes. I've wondered how popular that is.

12-26-2008, 11:54 AM
Jim, I relize what you are saying. There is also the arguement that the round is inhearently more accurate. But I`m sure you relize that if you put a custom tight neck chamber in a top of the line barrel for the .243 that you would never be able to find that extra accuracy. As for the .243 being a barrel burner I personally don`t see that at all. Unless you really abuse the barrel it will shoot well wat past 2,000 rounds, and I would guess it would still shoot well enough for a hunting rifle close to 5,000 rounds. Don`t get me wrong, if it`s what you want go for it. You might think my next project is totally silly too, but that`s why they make Chev`s and Ford, at least for a while yet. ;)

12-26-2008, 12:19 PM
"6mm International." It has been around for half of forever... Ruled the target butts for a time. Something about that funnel shape of the .250 Savage that contributes to accuracy... or so it seems. Last I looked, admittedly a while, it was still available in Rem 40X. There are a couple versions. One has a bit shortened neck as I understand. The other doesn't. I think you will find the dies cheap enough as "6mm International" and cases are necking up .22/250s or 250s down... HAPPY NEW YEAR. Luck. Happy trails.

12-26-2008, 12:58 PM
I've used the 6-250 for about 10 yrs. now. Some used the 6-250 in hunter class benchrest at one time because it met the case volume requirement. My barrel is 14 twist for 68 gr. bullets with a tight neck chamber. I use H414 and the old 68 gr. Berger MEF's (buy alot of bullets if your gun likes them) and shoot 3650 fps. and can easily go higher but I haven't full sized a case in years. This makes an excellent varmint round. I think the current trend is to use the 6-250 with heavier bullets/slower twist but I have a 6mm Remington for that. My 6-250 has countless rounds down the tube and will still group under 3/8" in a hunting stock.

Jim in Idaho
12-26-2008, 02:17 PM
Yup...I like the .243. had one for several years. I've found, as I get older, I don't care for a loud cartridge. I'm more a hunter than a rifleman, so I don't care about shooting beyond 300 yards, and rarely that far. I had my years of hundred rockchuck days, but now the whole thing for me is the hunting. I may even end up with one of the old 6X47's, or, more probably, a 6X45AI. Anything in the 3,000-3,300 fps range will get it done for me. My original idea was a 250AI, but after running the numbers in QL, I'm changing my mind. Thus the research into the 6mm's. In any case, I enjoy the discussion and appreciate the input.

Jim in Idaho
12-26-2008, 02:21 PM
Ranger, I agree on the 6mm International...good cartridge. I'm looking at that one, and a couple of others. The Intrnl would be just about right, and dies readily available.

12-26-2008, 11:29 PM
The gentlemen over at Benchrest.com are pushing the 6x47 Lapua hard on me.....top of the line brass, great accuracy, etc. Just darn expensive brass at over $1 a piece. But looking at the overall expenses, brass is the least of my problem.

This might turn into one very expensive long range coyote zapper project....he he

12-28-2008, 09:03 AM
I've ever met that had a 6mm-250 was happy with it and they seem to shoot real well in rifles that are properly smithed. Brass should be abundant too.

On the 6xc, IMHO, a VERY overlooked cartridge. Very efficient use of powder to get velocity in the neighborhood of the 243. It definately gives you more latitude with seating depth than the 243 does.

As with any other cartridge, if the rifle isn't built right, scoped right, loaded right, or shot right it is....... well, just another round. Just my humble opinion. WD

Tim Anderson
12-30-2008, 07:30 PM
The 243 is a much better cartridge over the 6mm-250, but the problem with a 243 is the bullet is moveing to fast for those of us that save the fur.
I use a 6mm H.L.S which is a 250 savage case necked down to 6mm and the shoulder pushed down, it falls in between a 6 BR and a 22-250. There maybe better choices but i like how it performs on coyotes and just something different...

Jim in Idaho
12-30-2008, 07:52 PM
Just saying "better" doesn't really mean much. Since not everybody agrees on the best parameters, you have to define what better means to you. Faster?, brass lasts longer? More accurate?

12-31-2008, 11:15 AM

I did the 6XC an it did not shoot as well as it should have. Go with a 6 Dasher of 6BRX. You get the same speed, less powder, unbeatable accuracy, and better brass.

Mark Schronce

12-31-2008, 02:06 PM
Nice round always wanted to build one,ended up with a 25-308 tying to get some load data for 75 grn V-Max,you cant beat that 6mm let me know if you get one.