Making 6mm Rem AI brass - question

[gene pool]

Gentlemen,

I am interested in building my next rifle in 6mm Rem AI. Concerning brass, can 6mm Rem AI brass be made from 6.5-284 brass? If so, is it done by simply running 6.5-284 brass through a 6mm Rem AI FL sizing die, then fire forming?

Thank you for your comments.

Gene

 

[Hotshot]

Gene,
6mm AI brass is very simple and has nothing to do with the 284Win case.
Chamber a 6mm Rem round and fire it, now you have a perfect 6mm AI.
There are dozens of opinions about fire forming your brass and I'm sure you will get some now, but I just shoot the standard 6mm loads at targets and prairie dogs untill I have as many 6mm AI as I want, then I load them and shoot some more.

 

[bozo699]

Gene,
The 6.5*284 is a total different breed not saying with some heavy duty forming it wouldn't be possible but definitely not practical. I use the exact same method as Hotshot with excellent results. 10 years ago I bought 150 pieces of brass for my boys .257AI and did what Hotshot did, varmints and practice until formed and we have many many loadings since I am sure the brass is going to out live the barrel, my 6mm AI is looking the same way. Anything in the 7X57 Mauser family will work but you might as well just use the 6mm so the headstamp is mostly correct IMHO.
Wayne.

 

[H2OBUG]

I found on my 257 BOB AI that if you seated the bullets "in" the lands -- on the first fire form rounds loaded them with a STD load --about mid way in the STD load data-- and used one of the faster burning powder listed in the data --I found you get much better case life.

A few of the first round I shot were factory loads the bullets were seated pretty deep and I had a case head seperate after 2 loadings--many of the other cases were thin-- this is when I went to the above method-- never had another issue

 

[shortgrass]

All the "Ackleys" have a shorter head space than their parent case. The go gauge for the parent (6mm Rem. in this instance) is used as the no-go gauge when chambering the 6mm A.I. (when I'm head spacing an Ackley chamber I cut until the bolt handle is half way into the closed position) A factory cartridge, when chambered, will give resistance to the bolt as it is closed. In this fashion, the cartridge is fully supported between the bolt face and at the base of the neck. This forces the base to be held against the bolt face. The forming has to come from the forward part of the case (to fill the AI chamber) , not the rear portion where thinning at the head can occur. Ackley Improved chambers head spaced in this manner don't need to have the bullet 'jammed' to keep the base against the bolt face. When I'm fire forming cases I always use new brass, it is not 'work hardened' and forms easily.

 

[bozo699]

All the "Ackleys" have a shorter head space than their parent case. The go gauge for the parent (6mm Rem. in this instance) is used as the no-go gauge when chambering the 6mm A.I. (when I'm head spacing an Ackley chamber I cut until the bolt handle is half way into the closed position) A factory cartridge, when chambered, will give resistance to the bolt as it is closed. In this fashion, the cartridge is fully supported between the bolt face and at the base of the neck. This forces the base to be held against the bolt face. The forming has to come from the forward part of the case (to fill the AI chamber) , not the rear portion where thinning at the head can occur. Ackley Improved chambers head spaced in this manner don't need to have the bullet 'jammed' to keep the base against the bolt face. When I'm fire forming cases I always use new brass, it is not 'work hardened' and forms easily.

Shortgrass,
I have three AI's based off the 7X57 M and did not know that, I do own the reamers but had a smith chamber the rifles but still I should have known that and did not, I will remove my post of jamming bullets even though I have and still will but this is very good information as this isn't the first time this question has been asked here on 6br but it is the first time I read a answer like yours but you know it makes sense, I haven't fireformed for them in years but now thinking back on it when you chamber a factory round there is a little resistance, that was over 15 years ago and I was in my precision infancy, back when I thought all you had to do was be precise on weighing charges and bullets was all that was necessary in precision re loading : Thanks again Shortgrass for clarifying
Wayne.

 

[rover31]

I just fire-formed mine with a light load of 90g B-tips and Varget. The accuracy was awesome and I was fire-forming!
T

 

[shortgrass]

All the "Ackleys" have a shorter head space than their parent case. The go gauge for the parent (6mm Rem. in this instance) is used as the no-go gauge when chambering the 6mm A.I. (when I'm head spacing an Ackley chamber I cut until the bolt handle is half way into the closed position) A factory cartridge, when chambered, will give resistance to the bolt as it is closed. In this fashion, the cartridge is fully supported between the bolt face and at the base of the neck. This forces the base to be held against the bolt face. The forming has to come from the forward part of the case (to fill the AI chamber) , not the rear portion where thinning at the head can occur. Ackley Improved chambers head spaced in this manner don't need to have the bullet 'jammed' to keep the base against the bolt face. When I'm fire forming cases I always use new brass, it is not 'work hardened' and forms easily.

Shortgrass,
I have three AI's based off the 7X57 M and did not know that, I do own the reamers but had a smith chamber the rifles but still I should have known that and did not, I will remove my post of jamming bullets even though I have and still will but this is very good information as this isn't the first time this question has been asked here on 6br but it is the first time I read a answer like yours but you know it makes sense, I haven't fireformed for them in years but now thinking back on it when you chamber a factory round there is a little resistance, that was over 15 years ago and I was in my precision infancy, back when I thought all you had to do was be precise on weighing charges and bullets was all that was necessary in precision re loading : Thanks again Shortgrass for clarifying
Wayne.

Just to 'back up' my info, it comes straight out of Ackleys books. It's also provided by some of the reamer makers when you buy an Ackley reamer (I know Dave Manson does.) I've never found I 've had to do anything 'special' to fire form an Ackley. On the other hand, I like the 'jam' method when fire forming either of the "Dashers".

 

[H2OBUG]

Will this work the same way in my non bolt single shot Encore??--my guess is it will not close without slamin shut--

BTW my 257BOB AI was and Encore