6mm-223

[IceAxe]

Ok, hmmmm so do I do one 6mm x45 or all four of them? A concern for me is I have a substantial amount of 6mmx45 loaded. I recognize we have to fire form the cases but how much will firing the non AI rounds effect accuracy from an AI chamber? Concern is over my pet loads.

Count me in for at least one barrel to be reamed.

[buckshotbarlow]

Fireformed rounds are actually pretty damn accurate. You will not loose accuracy with fire forming. I'm 100% in on all guns going to the 6x45AI, don't want to deal with any issues of the wrong ammo in the the wrong gun.

[buckshotbarlow]

i might get some of these for fire forming...
http://www.grafs.com/retail/catalog/product/productId/26941

or

http://www.midwayusa.com/product/939...ProductFinding

[DSB OUTDOORS]

Fireformed rounds are actually pretty damn accurate. You will not loose accuracy with fire forming. I'm 100% in on all guns going to the 6x45AI, don't want to deal with any issues of the wrong ammo in the the wrong gun.

^^^ This. I don't have a 6mm-223. But...... I do have a 6.5 Grendle. I fireform brass out of 7.62 x 39 brass and have the same results as factory brass.

[IceAxe]

We'll I may do as many as three but the conservative side of me will probably hold one out. Let me know when we can drop these barrels off as I will have to drive up from the Springs.

I don't see the Grendel as much of a delta on fire forming. I run the 7.62 x 39 cases through a 264 LBC, RCBS die and they are dimensionally similar to the Grendel brass from Hornady and Lapua. With the exception of the primer pocket of course. The 7.62 x 39 has about .015 more taper at the shoulder before firing than factory dimension .

[buckshotbarlow]

my problem with this whole thing is now i'm on armslist/gunbroker/everywhere else looking for a used action. I found a savage on AL, if one of u all beat me 2 it...no problem. I just can't justify ripping my model12bvss apart. It's a micky mouse gun at 200yds...

[Colorado Osprey]

my problem with this whole thing is now i'm on armslist/gunbroker/everywhere else looking for a used action. I found a savage on AL, if one of u all beat me 2 it...no problem. I just can't justify ripping my model12bvss apart. It's a micky mouse gun at 200yds...

Don't forget the Stevens 200 action is the same as well. You can still find these new (complete rifles) for under $280

[hghclsswhitetrsh]

Here we go...

[IceAxe]

In theory, you pull off the extensions, run the reamer and reattach the extension. You're not shortening anything, headspace stays "almost" the same as a regular 223. Here's a reference on the change.
http://www.accurateshooter.com/cartridge-guides/223rem/

Taken from the link..."This is because the overall geometry doesn’t change very dramatically other than the shoulder angle. You’re not blowing the shoulder forward into the neck."
Also, you increase the case volume around 7-8%, you get appx 100-140 fps more......All the more for a faster shooter, also looking at doing a switch barrel with my 223 savage.

I have an email into bert, i think he might kick my ass over this.

From what I've been able to research, you do shorten the barrel 1 thread.
http://www.ar15.com/archive/topic.html?b=3&f=4&t=304939

I also talked with Earl Hickman at Hickman Rifles here in the Springs and he confirmed the process requires 1thread removal. Also different go nogo gauges.


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[hghclsswhitetrsh]

Dropped off my parts at Bert's today. Hopefully have an assembled upper in a month.

Now to find dies for the 6x45ai.