Fire forming question

[Twisted300Win MAG]

I’m wanting to try the cream of wheat method of fire forming for my 260AI. My question is has anyone here tried using foam ear plugs instead of pillow stuffing? I have a huge bag of ear plugs left from a project and was thinking of filling the case with the wheat up to the neck shoulder junction then installing the ear plug and razor off the excess. Any insight would help.
Thank
Donald

 

[linedrive301ft]

It should work for you but I think it will not be fully formed. Try it and see what the case will form too.
Your second firing should almost be fully formed.

 

[spife7980]

Do you really want melted foam coating your barrel?
I’d go a small wad of toilet paper

 

[MarinePMI]

It’s an AI, right? Just shoot regular.260 and be done with it... Does the 260AI preclude this for some reason?

 

[Twisted300Win MAG]

It’s an AI, right? Just shoot regular.260 and be done with it... Does the 260AI preclude this for some reason?

I normally fire form with hot 260 loads. This barrel is getting pretty high on round count and I’d like to preserve some of what’s left Until my new barrel is done. Round count is little over 1800 and I just killed my last batch of brass after 13 firings. My new barrel is 3+months out(trying something different)

 

[KTAK]

Even a soft loaded round has enough pressure to fire form the case... and doesn't put undue wear on your worn out barrel...

 

[MakeSawdust]

Hydroform. It's cheaper and a big pain in the ass until you get it figured out. Once you have it figured out you'll wonder why you did it any other way.
You can run full power loads on the first firing with no issues if it is done right. No barrel life, powder, or bullets used. PM me if you want to know how I do it.

 

[Herstal 12]

I shot a 243 AI in Fclass for a while, I just fireformed the brass at the matches (no further than 600yds)worked just fine.
I knew a guy the saved an old worn out barrel and used it to fireform his 6mm dasher with the corm meal method in his garage and an old stump to catch the bullets. There is no crazy way to do this,only crazy people ??
Cheers

 

[MakeSawdust]

I agree, forming brass is for crazy people, but at least I rarely have to trim it.