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Need input and information on a 6-22/250

I have been reading articles on the site and find it to be my absolute favorite for informative articles. The members here make this site what it is-Thanks________---

I am seriously considering building a 6mm/22-250 and want some suggestions and input. I like several of the widlcats I have been reading about here, but the sound of less expensive brass is alluring. I want to build a rifle that is easier on the barrel then the 243 Win, easy to form,minimal work-running 22-250 through a sizer hopefully), smaller case capacity then the 243 to aid in barrel life, and that will feed through a 700 magazine.

I will be shooting 85-95 grain bullets. I believe that a 1-10" will stabalize the 95 SMK and hope to get decent velocity,2650-2950fps) if possible.

Does anyone have any experience with this round? LOAD data, reamer suggestions- Manson, Clymer, PTG? etc...

Thanks,
 
Btrapr: I had a Shilen barrel, 1-10, chambered for the 6mm22-250 in Sept.'05. Currently have 843 rds. thru it. Same as you, I got tired of burning up .243 barrels at 1400 rds. The 6x22-250 has been good: nothing outstanding: I think of it as a 22-250 that shoots 6mm bullets. Most consistantly accurate load to date has been 34 grs. of IMR3031 with the Sierra 75 gr. HP #1510. Leade area in front of the chamber still looks good with my borescope: no fire cracking yet. Before mentioned load combo will average 1 1/4" with 5 shot groups at 200 yd. I bought my own JGS reamer, still have it, with the spec. sheet. fdshuster@hotmail.com
 
My son has a 6x250 and although he likes the caliber and its accurate, he has had problems with inconsistant stiff bolt lift. I have since read that this is a problem with the 6x250s.

I was going to build one then I decided to go with a 6XC which is a much better case in my opinion. NO forming, good brass and more velocity and better accuracy. Its the difference between a 22-250 and a 22-250imp. Think of the 6XC as the improved.

Its one of the most accurate guns I have at the present. I would class it as a mini 6.5x284. Try it you won't be sorry!!
 
A very nice wildcat that will meet all of your goals.

Only downside of using the reg. 22/250 case is the body taper and shallow shoulder angle. At elevated pressures, you will get more backthrust which will cause stiff bolt lift.

Big reason many of us like improved case shapes. They handle the pressures 'better'.

If you keep the loads moderate, it will run no different then the thousands of 22/250's out there.

The 87gr Vmax and 90gr Lapuas are definitely worth a look.

Jerry
 
I shoot the Ackley version and can't give first-hand advice, but I know several people who tried the "standard" chambering of the 6-250. Without exception each person came to the same conclusion: brass life is terrible. Eventually they all rechambered for a more improved design,6XC, etc). The 22-250 case has a lot of body taper which results in heavy bolt thrust, case stretching, constant trimming and premature brass failure. Loading down will increase brass life somewhat but your powder charge density will be pretty lame. A possible solution may be to load with an extruded powder at the slow end of the spectrum.

The 6BR would normally be the ticket for you, but since you are looking for a cartridge that will feed reliably through a factory 700 magazine, a longer case will simplify the process. So now we come back to the 6XC or 6x47 Lapua ... but that defeats your quest for cheap brass.

Wish I had a real answer for ya.

Tom
 
I have an AR-10 upper done in 6mm/.22-250. I plan to improve the chamber with a .22-250 Ackley Improved reamer. This approximates the 6mmXC case dimensions.

Brass is very easy to expand using a Redding Bushing die with the expander mandrel on the decap rod. I have a .22-250 FL busing die which takes the 6mm bushing very easily, and purchased a 6mmXC ctg chamber to use with a Forster comp seating die.

The 6/.22-250 Ackley has great potential, and by reducing the taper of the parent ctg, I will have better magazine functioning. As it is now, only 7 rds can be loaded before tipping occurs due to the taper.

Good luck with a great cartridge.
 
Hogan,

Do you plan to chamber a 40 degree shoulder or 28 degree? I would think the 28 degree would feed more reliably in your AR.

Tom
 
I will be shooting 85-95 grain bullets. I believe that a 1-10" will stabilize the 95 SMK and hope to get decent velocity,2650-2950fps) if possible. *I did find that Berger recommends a 1-10" twist for their 88FB & 90BT, and a 1-9" twist for their 95VLD. Looks like a 1-10" or 1-9.5" would be ideal for my plans.

Follow-up on the following;
The 22-250 case has a lot of body taper which results in heavy bolt thrust, case stretching, constant trimming and premature brass failure. Loading down will increase brass life somewhat but your powder charge density will be pretty lame. A possible solution may be to load with an extruded powder at the slow end of the spectrum. *Dave Kiff is cutting my reamer to a .2745" no turn neck, 60 radius at the neck/shoulder junction,to minimize brass flow__sticky bolt), and a min spec body with a floating head.


I found the following posted on another site! DO NOT USE this data without a safe,reduced) starting load.

For 6mm/22-250 at ~2800 fps;
Pet load - 32 gr Varget, Sierra 107, .005" off lands For 6mm/22-250, 105-107 grain bullet at about 2750-2850 fps,
IMR 4064,31-32 grains)
Reloder 15,31-32 grains)
AA2520,31-32 grains)
IMR 4895,30.5-31.5 grains)
H335,31-32 grains)
IMR 4350 too slow
 
I shoot a 6mm/22-250.I have 1900 rounds down the tube and it still preforms great.It has never failed to place in a match,and has won a few.My brass life is great and never had sticky bolt problems.My velocity with 80gr Berger's is equal to the 243.Pm me if you want some of my load data.
 
I have been looking at the XC, 6x47, 6mmAR, and several others.

I have a 22-250 now so brass purchased in bulk can be used for either gun. Lapua, Norma, and the like are great but you pay for them. I am not going to max out my loads so stadnard brass should work just fine for multiple loadings.

Thanks for the imput!

*I am still looking for loads! HAS anyone tried IMR 4007 SSC
 

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