Finally! Rolled my own 300 AAC

[bettingpython]

[FONT=Helvetica, Arial, lucida grande, tahoma, verdana, arial, sans-serif]I only started this process back in 2012, I've got about 500 pieces of clean converted primed brass just been sidetracked too many times.[/FONT]

[FONT=Helvetica, Arial, lucida grande, tahoma, verdana, arial, sans-serif]15 rounds done time to range test.[/FONT]

[FONT=Helvetica, Arial, lucida grande, tahoma, verdana, arial, sans-serif]15 grains of n110[/FONT]
[FONT=Helvetica, Arial, lucida grande, tahoma, verdana, arial, sans-serif]125grn Sierra Match king[/FONT]
[FONT=Helvetica, Arial, lucida grande, tahoma, verdana, arial, sans-serif]CCI 450 primers.
[/FONT]Primer pocket swaged to remove military crimp, (all my brass is NATO 5.56 military, Prvi Partizan, Adcom, IMI, and LC)
[FONT=Helvetica, Arial, lucida grande, tahoma, verdana, arial, sans-serif]converted brass from 5.56 case trim length 1.365" [/FONT]
[FONT=Helvetica, Arial, lucida grande, tahoma, verdana, arial, sans-serif]OAL seated Length 2.120" no crimp.
[/FONT]Loaded with a Rock Chucker single stage using Lee Dies.

 

[swampratt]

Looks good Great job!
Do you guys anneal the necks after forming or is this not necessary?
Keep us updated with range report.

Be nice to sort by head stamp and shoot for groups and see which head stamp shoots best

 

[bettingpython]

No annealing. If I get 4 reloads out of a piece of brass I'm good with that. A lot of info over on 300 black talk forums about accuracy and what not. These are to feed my AR not so much for high precision. I have read the LC brass is a little thicker leading to a slightly smaller case volume and higher pressures; but with the Vita Vhouri N110 even with a compressed load a lot of guys are saying they don't reach max velocity or pressure on the supersonic rounds but they are getting the best accuracy. I chose it as my first powder because I couldn't find h110, w237, lil'gun, or a1680, and because it's really hard to screw up so badly you have a kaboom with it.

 

[bettingpython]

15.0 grains of N110 was too light, enough to eject the spent casing. But short stroked the bolt and wouldn't strip another round out of the magazine. 15.5 grains was almost enough. Primers are still looking good so I have 5 rolled up at 15.9 and another 5 rolled up at 16.1 bumped the OAL to 2.125 inches still a little bit of charge compression though. Using a lee factory crimp die to build a little more pressure.

 

[Blitzfike]

I still haven't finished working up my loads for the AR in 300, but I have an Encore 16.5" barrel that shoots the 300 very well. I have been loading everything from 150 to 180 grain bullets for it playing with subsonic or near subsonic loads. I made a barrel for one of my savages from a blank and it shows some pretty good possibilities as well. I don't own a supressor yet, so that part is in the future.

 

[dstorm]

Good luck! I just ordered some of the 125gr sierra matchking to load for my 300 blackout. i want to see how they compare to my Barnes 110 gr TAC-TX for feeding and accuracy. i will post how it worked. Luckily i have a few pounds of W296 left. i also have some nosler 110gr varmageddon loads with W296 that i have loaded, but not tested.

 

[bettingpython]

I'll run my next 10 rounds tomorrow and report back. I have high hopes for the 16.1gr loads. most people loading for blackout say they are getting the bestbaccuracy and performance with N110 loaded at the max charge. For 125's I'm seeing 16.3gr as the max and I believe it. Just not enough cased volume to load it to full pressure.