Fire forming 22-250 from 308.

[flipajig]

I have already trimmed and reamed the neck along with full Leigh sizing the brass. I was think about useing a cast Boolit and a light dose of a fast burning pistol powder. According to the Lyman 4th 700x at 7 grains and 100 pices of brass that is 700 grains of powder and with a limited amout of 700x and useing it in my shotgun with no end in sight on this powder shortage the story goes on.
Any one know of a different powder that I can use to fire form I thought about cream of wheat. I also have a deasent suply of Unique HP-38 and about a lb of Tight group. Or can I just work up the load useing a 55 grain bullet and IMR 4064.
Thank you
Flip

 

[howlnmad]

Going by the burn rate chart, your titegroup is going to be the closest to 700x from what you have.
You say that you've FL sized the 308 brass with a 22-250 die. Have you measured the body of the sized brass at the head? The 308 has a slightly larger diameter at the head and a slightly thicker rim.

 

[flipajig]

I haven't measured them but I have cycled them through the 250 wth out any issues.
I barrowed a 250 to run them through I'm waiting on funds from a sale to get my new rifle a Howa 1500

 

[LAGS]

First off, I don't understand why you are making your own cases, and are you chambering them in a 250 or 22/250 to test sizing ?
You are asking a lot of questions for someone who is doing some pretty advanced reloading and reforming.
I would take a step back , and if you have a NEW rifle coming, then start off with Factory Ammo.
Sorry, But always Safety First.

 

[rcmodel]

+1 to that.

But also, I don't understand why you want to fire-form them in the first place?

Your 22-250 die re-sized them to factory specs.
Then you said you trimmed and reamed them, right?
And you said they chamber fine, right???

So, load them and shoot them with your regular load.

They can't get any more fire-formed then that after the first firing!!

That's all I ever did when making 25-06 cases out of 30-06 cases many years ago.

They shot just as accurately the first time as they did the 2nd., 3rd., 4th., etc.

rc

 

[Trent]

Yeah usually fire-forming is in the opposite direction. Blowing the shoulders forward or widening the case mouth.

You're going shorter and tighter so it's just a mechanical sizing, trimming, and reaming operation.

 

[Trent]

moved to PM

 

[flipajig]

Wait a minute fellas
Maybe I asked my question the wrong way
1) 250 I shortened it from 22-250.
2) any time I full leanth size any brass I chamber it before loading to enshour it's sized right
With the sholder moved far enough back.
I have formed brass before but Ive never gone that far 308 to 22-250 is a big change in brass size.
I've formed 7-30 Waters 7-08 and I've fire formed 7TCU
Thank you RC you answered my question.
Flip

 

[LAGS]

@ Flipajig.
I understand about you condensing your discription, But I would advise that you refrain from doing that for the simple fact, that someone can give you some very Wrong and potentially Dangerous information.
We try to stay on Specifics, and a professional level for Safety and not to be know it all's.
You may know what you have, but we often dont.
Complete information can get you the right and complete answer.

I am sorry, and I don't mean to offend anyone.

 

[flipajig]

No ofence LAGS
Safty is key and the most important there are a lot of newbe loaders out there
We all were at one time.
Before I start a project I resusurch it as much as I can. If you have to you can size 06 brass to 308 7-08 243 22-250 and several others the 8mm x 57 mouser I beleve is the original parent case and has been formed into more than I'm able to list.
Thank you for your concern
Flip

 

[Walkalong]

Make sure the necks are not to thick for your chamber after squeezing a .308 neck down to .22.

 

[flipajig]

Thank you Walkalong I will