6 creedmoor to 6x250

[Fast14riot]

I have an old xtc gun I picked up in 6x250. Only brass I've had is old Rem 22-250 but would like some SRP brass for it. 6 Creedmoor is close, if I can find a used 22-250 body die I can get a 6cm collet neck die and make some good brass for it.

Anyone resizing/trimming 6cm to 250 sized brass? Also, anyone have a 3-4 extra pieces of 6cm brass I can use to figure out my resizing with? Can be worn out, just want to experiment with sizing before buying 100+ cases. I do have an old RCBS 6x250 FL die for initial testing.

 

[abishai]

You may be better off using 6 XC brass as the shoulder wont have to be mushed back

 

[Fast14riot]

I'm open to trying that too, just depends on availability.

 

[bozo699]

I'm open to trying that too, just depends on availability.

I rebarreled my 6xc to 6cm I should still have brass for the xc, I bought the gun and brass from a fellow shooter/Machinist buddy, I’m going to the ranch today I can look if your interested, I have to look for some .300 savage dies for another forum member anyways
Wayne

 

[Fast14riot]

I rebarreled my 6xc to 6cm I should still have brass for the xc, I bought the gun and brass from a fellow shooter/Machinist buddy, I’m going to the ranch today I can look if your interested, I have to look for some .300 savage dies for another forum member anyways
Wayne

I'd like to try a few pieces through my die before committing to it.

 

[ar15Jeff]

I also have a 6-250. I think you will find out that trying to resize a straight wall case to 22-250 taper is almost impossible, I’ve tried. Better to get good quality 22-250 brass, much easier.

 

[bozo699]

I'd like to try a few pieces through my die before committing to it.

I made it to the ranch, found some 6xc , I’ll clean it up and see what it looks like, it’s Norma brass
Wayne

 

[Mike Casselton]

I rebarreled my 6xc to 6cm I should still have brass for the xc, I bought the gun and brass from a fellow shooter/Machinist buddy, I’m going to the ranch today I can look if your interested, I have to look for some .300 savage dies for another forum member anyways
Wayne

Sorry for the temporary derail:
Wayne, is your buddy looking for a specific brand of 300 Sav dies?

If not, I have an old paper box set of Lyman dies here and they are in great shape.
I'll send them to you if they'll work for him.

 

[Fast14riot]

I also have a 6-250. I think you will find out that trying to resize a straight wall case to 22-250 taper is almost impossible, I’ve tried. Better to get good quality 22-250 brass, much easier.

Exactly why I wanted to try out a few pieces. The slight bit of taper of 6cm i thought would work better.

 

[bozo699]

Sorry for the temporary derail:
Wayne, is your buddy looking for a specific brand of 300 Sav dies?

If not, I have an old paper box set of Lyman dies here and they are in great shape.
I'll send them to you if they'll work for him.

Mike,
He wanted a set of the old Lee dies you use a mallet on. I have them for 06 and 303 British but couldn’t find .300 Savage. Thank you for reaching out
Wayne

 

[mikecockcroft]

I can send six 6CM cases if that helps, they a Lapua

 

[Fast14riot]

I can send six 6CM cases if that helps, they a Lapua

Sending PM

 

[Fast14riot]

Got the six Lapua 6CM cases today. Annealed them pretty good, down into the shoulder a bit since the 250 shoulder diameter is about .050" smaller than 6cm.

Using my RCBS 6mm250 die, lots of lube I found that two passes worked well. First squeeze went about half way in, back it out and relubed the case to finally send it home. As expected I will need to trim, but on first glance everything seems to be ok. The cases I received to try out were fired and had a donut inside that proved to be a bugger to get over the expander. New cases wouldn't have such problems.

L-R
Factory 6cm case, first squeeze, final form.




L-R
Fired 6x250 from RP 22-250, formed 6cm, factory 6cm




Never had any collapsed shoulders, stuck cases, etc. Seems like this is a viable option. Will trim and check in my rifle for final confirmation.

 

[LCazador]

I have an old xtc gun I picked up in 6x250. Only brass I've had is old Rem 22-250 but would like some SRP brass for it. 6 Creedmoor is close, if I can find a used 22-250 body die I can get a 6cm collet neck die and make some good brass for it.

Anyone resizing/trimming 6cm to 250 sized brass? Also, anyone have a 3-4 extra pieces of 6cm brass I can use to figure out my resizing with? Can be worn out, just want to experiment with sizing before buying 100+ cases. I do have an old RCBS 6x250 FL die for initial testing.

I would advise against using SRP brass unless you have a small firing pin hole in the bolt and small firing pin assembly. The SRP brass isn't necessarily going to render much better performance on target and it could cause a lot of headaches. I shot a 6X250- 40degree back in mid 80's which was chambered by P.O. Ackley. I did this "wildcat" so to speak because the choice of bullets in 25 caliber were slim and none. It was a 1000 yard gun and super accurate. Powder choice was not good back then either.

 

[Fast14riot]

Managed to get one trimmed close enough to length (dont have a trimmer for this one yet) and turns out that the case web area is too large for my chamber. Just won't fit. Tried one of my ring dies on the cases and it won't take it down far enough. I also suspect the difference in rim and case head design might be part of it.

Oh well, that's why I wanted to try.

I would advise against using SRP brass unless you have a small firing pin hole in the bolt and small firing pin assembly. The SRP brass isn't necessarily going to render much better performance on target and it could cause a lot of headaches. I shot a 6X250- 40degree back in mid 80's which was chambered by P.O. Ackley. I did this "wildcat" so to speak because the choice of bullets in 25 caliber were slim and none. It was a 1000 yard gun and super accurate. Powder choice was not good back then either.

Yes, firing pin is bushed. Also has a sako extractor. I did find an article about the 6x250 written by Robert Whitley in Precision Shooter, October 2001. He used only Varget with 105-107s. Somewhere around 34-35gr, iirc.

 

[ar15Jeff]

I was surprised you were able to get one thru the sizing process. I tried using 243 brass and got the case stuck even when using lots of lube (Hornady die). My load was using 32.5gr N150 ,WW 22-250 cases and 105 Amax bullets, which ran about 2880 in a 28" barrel. I could have loaded hotter but the primer pockets would open up, there were no other pressure signs. That was why I wanted to try 243 brass, I figured the 22-250 brass was too small in the head area and allowed too much head expansion. Had the same problem making 240 NMC brass from 22-250 brass, loose primer pockets at lower pressures. Made them from WW 243 brass and now I can run at 6 Creedmoor velocities with no pressure problems. 6 Creed or XC would be the easy button, but they weren't around when I built the rifle.

 

[SeabeeKen]

Went thru this with my 250AI when trying to use CM brass. CM uses the 308 win head and the 250 savage uses the smaller .467 IIRC. Gave me clickers near max loads and a few had to be driven out with a cleaning rod. Try 6XC brass as its roots are with the 250 savage case. You may fine the thicker case head causes clickers though.

 

[Fast14riot]

Went thru this with my 250AI when trying to use CM brass. CM uses the 308 win head and the 250 savage uses the smaller .467 IIRC. Gave me clickers near max loads and a few had to be driven out with a cleaning rod. Try 6XC brass as its roots are with the 250 savage case. You may fine the thicker case head causes clickers though.

I think 6xc will be the next attempt. I have a couple of those laying around I might try. Being straighter walled than the 6cm might make it quite a bit more difficult though.