6ppc/6-250 101 please

[Webphut]

A 6ppc and a 6-250 fell into my lap recently. I am a total greenhorn with these two calibers. I know I need to fire form casings from a different/parent casing and probably neck them down and possibly even shorten the casing length too. I figured out the 6ppc pretty quickly on the internet and if I am correct, I will need to fire form it from a .220 Russian casing. I also tried researching the 6-250 to only become more confused. The internet only left me questioning if the 6-250 is a 6 br, 6 xc, 6 ar, 6 dasher or just another 6ppc using different terminology. Anyways, any beginner/greenhorn information on which casing is used in the 6-250 would be greatly appreciated.

[bsumoba]

I would assume the 6-250 is a 6mm bullet and used with a necked up 22-250 case. Please do not take my word for it, but that was my initial suspicion.

The 6BR is its own case on the 6 Dasher, 6 BRX, are made from the 6 6BR parent case.

I have no experience with the 6XC.

[MongooseV8]

You don't need to fire form 6ppc. You can find brass online. And yes the 6-250 should be a necked up 22-250 case.

[AFTII]

Welcome to the wonderful world of wildcats. My first was a .22-250 AI. In the intervening 20 years, I've had quite a few ranging from .22 S&M (a wildcat I developed with gunsmith Bob Sutton) to .35 AI. I still have that .22-250 AI and three 6ppcs.

Unfortunately, you really haven't given enough info to get a reliable answer. You are correct that a 6 ppc is based on a 220 Russian Case (or a 7.62X39 with a small rifle primer). But, in the real world, this means nothing. I've seen chambers with necks ranging from .260" to .272+."

I started to write a novelette about how to deal with wildcats, but the more I wrote, the more I wanted to write. It's just not a topic to treat lightly. I've seen quite a few guns blown up over the years. (Not to worry, none of them were mine.)

I'm not sure where you are, but I'd be willing to help you if you are close. Depending where you are, I may also be able to introduce you to another benchrest shooter that could help you get things sorted out. Drop me a PM if you are interested.

[6mmintl]

[6mmintl]

Kendog4570 has reamer and has chambered many of my rifles.

Excellent gunsmith in Bay area for many years.

[Webphut]

Welcome to the wonderful world of wildcats. My first was a .22-250 AI. In the intervening 20 years, I've had quite a few ranging from .22 S&M (a wildcat I developed with gunsmith Bob Sutton) to .35 AI. I still have that .22-250 AI and three 6ppcs.

Unfortunately, you really haven't given enough info to get a reliable answer. You are correct that a 6 ppc is based on a 220 Russian Case (or a 7.62X39 with a small rifle primer). But, in the real world, this means nothing. I've seen chambers with necks ranging from .260" to .272+."

I started to write a novelette about how to deal with wildcats, but the more I wrote, the more I wanted to write. It's just not a topic to treat lightly. I've seen quite a few guns blown up over the years. (Not to worry, none of them were mine.)

I'm not sure where you are, but I'd be willing to help you if you are close. Depending where you are, I may also be able to introduce you to another benchrest shooter that could help you get things sorted out. Drop me a PM if you are interested.

Thank you. On the 6-250 there is a neck dia. labeled next to the caliber size. I think it is .263" or.273", but I will take a look on that. Ok so to make things clear though, the 6-250 is a 22-250 necked up to noted neck diameter labeled on the barrel. On the 6ppc, I can buy preformed 6ppc casings, if I understand correctly? Thank you. I found factory new bags of Lapua casings in all the different 6mm-22 caliber variants in my dads collection, but was like uhhh ok which goes to which. I quickly learned though the 220 russian were the 6ppc as the fired casing in his reloading collection actually would allow the bolt to close and eject the shell smoothly. On the 6-250 though I tried all the differant casings he had, but either were way too short for the chamber or just did not work, that is why I was asking. I only got more confused as I researched it on the internet on the overwhelming amount of variants in the articles I did read. This helps me greatly. I am going to assume though, I can not just buy some head space guages in the 6-250 caliber because of so many variables with the 6-250. I appears very experimental in terms of reinventing the wheel with diferent reloaders. I probably am missing on a lot of information to assume this, but knowing what I know now, that is what I am seeing. Thank you.

[Webphut]

What distances are the 6mm ppc and the 6mm-250 generally accurate out to? I know most (all the shot target I have seen anyways) will shoot through the same hole at 100 yards, but I have never owned one before.

[buffybuster]

What distances are the 6mm ppc and the 6mm-250 generally accurate out to? I know most (all the shot target I have seen anyways) will shoot through the same hole at 100 yards, but I have never owned one before.

With the correct bullets and right rifling twist:

6mm PPC 600yds
6mm-250 1000yds

[killshot44]

OP, a good thing to use (mail order) is Cerrosafe. It is a lead-like material that melts at 170 degrees. You melt it and pour it into the chamber of the barrel (much easier to do with the barrel removed, you also must plug the barrel just beyond where the chamber transitions into the grooves and lands)
The casting solidifies in a minute and shrinks slightly allowing its removal from the chamber, within 30-60 minutes the casting will expand to the size of your chamber.
Measuring this casting allows you to KNOW the neck dimension (most important) and the rest of the critical case dimensions.

The PPC is must definitely NOT a 600yd round. It is a short range benchrest round - one of the best.

Do this, or have a smith do it, BEFORE you start trying to buy brass or use any of the hand-me-downs you inherited.

[Flouncer]

Cerrosafe - Brownells

I found this for you. I had this done by my GS back when my 6.5-06 was a wildcat. Never used it, never worried that much about all the endless possibilities. But I could and did just run everyday Remington 25-06 brass through a RCBS 6.5 die and shoot. Smith never mentioned necks or thickness and I never gave it a moments thought. But that was no bench gun or cartridge. Ignorance is bliss I guess.


Here is the read and link:

http://www.brownells.com/gunsmith-tools-supplies/barrel-tools/barrel-chamfering-accessories/cerrosafe-chamber-casting-alloy-prod384.aspx

[MongooseV8]

Cerrosfe works pretty well.

[AFTII]

Thank you. On the 6-250 there is a neck dia. labeled next to the caliber size. I think it is .263" or.273", but I will take a look on that. Ok so to make things clear though, the 6-250 is a 22-250 necked up to noted neck diameter labeled on the barrel.

It might help if you gave your dad's name. I stopped regularly shooting BR competitively in around 2008, but might have known him. If not, I might know people that might have known him. The reason I ask is because people tend to know what combos other people are shooting. So, someone might know you dad's set up and that could save you a lot of time and effort.

I don't have any Lapua .22-250 brass handy, so I can't measure the neck thickness. However, I can guarantee a .263" neck would require turning. Not sure about a .273," but I would guess it requires turning as well.

Things to look for in your dad's collection: chamber reamers, neck turners, measuring instruments such as micrometers and dial indicators. http://www.accurateshooter.com/techn...ase-neck-mics/ If he had these tools, chances are he was turning necks.

Oh, and you should look for reloading dies. The type of dies could shed some light on what you have. Some dies have internal bushings that can be changed out to match the chamber.

On the 6ppc, I can buy preformed 6ppc casings, if I understand correctly? Thank you.

Well, probably. It depends on the brass and the chamber. Norma sells 6PPC cases, but you may still have to turn necks. That said, Lapua .220 brass is the best stuff out there. IF, you do have to turn necks, there are people who sell turned brass. http://www.benchrest.com/hoehn/html/ammo___brass.html But, they do charge for this service.

I found factory new bags of Lapua casings in all the different 6mm-22 caliber variants in my dads collection, but was like uhhh ok which goes to which. I quickly learned though the 220 russian were the 6ppc as the fired casing in his reloading collection actually would allow the bolt to close and eject the shell smoothly.

I'll bet if you look hard enough, you'll find some fire formed 6 PPC. That MAY help you figure out what you have.

On the 6-250 though I tried all the differant casings he had, but either were way too short for the chamber or just did not work, that is why I was asking.

Do those short cases fit in the 6PPC?

I only got more confused as I researched it on the internet on the overwhelming amount of variants in the articles I did read. This helps me greatly. I am going to assume though, I can not just buy some head space guages in the 6-250 caliber because of so many variables with the 6-250. I appears very experimental in terms of reinventing the wheel with diferent reloaders. I probably am missing on a lot of information to assume this, but knowing what I know now, that is what I am seeing. Thank you.

You should probably have someone take a look at it for you. But, see if you can find a chamber reamer. http://www.realguns.com/archives/093.htm They are usually in a rectangular plastic box. If you find a reamer, it will have all the info you need to figure out what chamber you have. Well, unless you find multiple reamers. Doh.

The last resort would be to get some cerrosafe and cast the chamber or take it to a gunsmith.

[LynnJr]

On the 6PPC it is the world's most accurate rifle out to 300 yards. Gunsmith Jim Borden has also shot and won The Egg Shoot at either 550 or 600 yards with a 6PPC.
You can buy brass that is completely 100% set up and neck turned from Bob White at The Shooters Corner the world's largest selection of benchrest rifles or you can buy it from Ron Hoehn or Lester Bruno.

On the 6-250 you take 22-250 brass and run it over an Expandiron made by K-M Tool in the first photo.
Here is a picture of a K-M neck Turner and a Pumpkin neck Turner.
Likewise if you PM me your father's name I either know him or someone who does.

[ar15barrels]

Thank you. On the 6-250 there is a neck dia. labeled next to the caliber size. I think it is .263" or.273", but I will take a look on that. Ok so to make things clear though, the 6-250 is a 22-250 necked up to noted neck diameter labeled on the barrel.

You can also just neck down 250 savage cases to 6mm to make the 6-250 cases.
That would be easier than expanding 22-250 cases.