8.6 Blackout

[TeamTomlyn]

Welp there goes my lunch money... I will try and catch up to yall as you do some R&D lol

 

[swampratt]

338 Federal from 2006 is a round made from necking up the .308.
Then there was the 338 RCM released in 2008 to trump the velocity of the 338 Federal.

Why this super slow 338?
Yea a bigger hole and more energy but I have found the 55gr V-max at 2900fps dropped all deer and hogs I hit with it faster than any heavier bullet I have ever used.

I think the 1:3 twist is way out of the norm and that gets the round in our brains as being something very different and exciting and makes you wish you had one.

I am not falling for that again after the hype of the 6.5 CM.
I suppose if you love the sub sonic and shoot suppressed this would interest you more.

 

[TeamTomlyn]

I am not falling for that again after the hype of the 6.5 CM.

This is the best use of a 6.5 CM case I can think of lol.
I think this will make one heck of a brush hunting round

 

[Scott3708]

Purchased a load of LC 308 brass to resize to 8.6... didn't know all LC brass would have neck thickness around .017". So I bought the forester reamer... come to find out you can only ream once fired brass. Don't have any fired brass as no ammo available anywhere 8.6 BO. So bought a neck turning jig Hornady, but doesn't come with a 338 mandrel... so bought one of those. Annealed the brass with ugly Annealer, that worked awesome, bought lee 8.6 dies set, formed brass, trimmed brass 1.685" then neck trim to.008" a side, seated a bullet, behold it slide into chamber clunk, then slid out., ok on a roll. Now load testing, one round to lock back, 10g,thru 17g, nope no lock back. Went to 20g locked back and ejected 3:00. Aligent 1680, but she locks back. So that's a plus, these are 270 Hornady ELD. Just thought sub would lock back around 14 not 20, I'll keep trying.

 

[Lineman]

Hornady 6.5 once refired and formed I’m getting .013. Federal 7.62 7.62 M1A brass is .016 after forming.
I’ll update when I start trying other brass.
Have some new Hornady 6.5 I am going to size down too. So far from have I have seen there shouldn’t be a need to anneal. But there’s also only two powders listed for reload data so almost SAAMI but still wildcat.

 

[Scott3708]

So far I’ve tried the AA1680 and the CFEBLK both seem to give identical ejection, but still need to Chrono to be sure. 19g of either is as low as I can go on my Aero M5 setup for 8.6 and be reliable to eject, load and lock back. I could prolly try a lighter buffer/spring combo, but for now it’s solid. The Hornady 6.5 brass and the Winchester 6.5 brass neither I had to anneal, and I didn’t need to neck turn, chambered well. But I shoot more 6.5 than the 8.6, so I’ll stick with the 308 range pickup and neck turn for now. I find when I do find a acceptable neck thickness, even If I neck turn almost nothing is removed. Still waiting for someone to come out with a case gauge. As using my AR chamber is a pain in the butt!

 

[Lineman]

So far I’ve tried the AA1680 and the CFEBLK both seem to give identical ejection, but still need to Chrono to be sure. 19g of either is as low as I can go on my Aero M5 setup for 8.6 and be reliable to eject, load and lock back. I could prolly try a lighter buffer/spring combo, but for now it’s solid. The Hornady 6.5 brass and the Winchester 6.5 brass neither I had to anneal, and I didn’t need to neck turn, chambered well. But I shoot more 6.5 than the 8.6, so I’ll stick with the 308 range pickup and neck turn for now. I find when I do find a acceptable neck thickness, even If I neck turn almost nothing is removed. Still waiting for someone to come out with a case gauge. As using my AR chamber is a pain in the butt!

Have you done any super sonic loads with the CFE BLK?
I lucky have a extra barrel for now(need another 700 short action)to check mine, but would be great for a case gauge!

 

[amcardon]

What dies are y'all using? I've been considering a 8.6 setup, just can't find components or dies... This looks like a good time to get some use from my dillon trimmer!

 

[Lineman]

Lee has a set, don’t buy the factory crimp die separately it comes with one… Hornady also is making them but have been out of stock.
If you do get Hornady I have an extra factory crimp die I’ll sell for $10 and it’s BNIB lol
I ordered the Lee die set from Midway and they were here in 2 days.
Yes your case trimmer will be definitely get a work out!

 

[50Shooter]

Hey guys, I just ordered an 8.6 barrel for a SBR build. How goes the 308 to 8.6 conversion? I'm in the same boat as you guys with a lot of 308 brass. I've never owned a Creedmore anything. When you say you need to turn the neck are you turning the outside of the neck or reaming the inside?