I love it.This seems like an amazing idea for annealing.
https://www.instagram.com/reel/CdJRjLNjt-B/?igshid=MDJmNzVkMjY=
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I love it.This seems like an amazing idea for annealing.
https://www.instagram.com/reel/CdJRjLNjt-B/?igshid=MDJmNzVkMjY=
Shoot a single round at a time. See if she locks the bolt back or not.First batch of 300BLK went to the range yesterday. Minor issues on FTF and stovepipe.
It's the gun not the loads as I used factory ammo as a control group with same issues on that.
Reloads were 220 grn Berry's over 10.8 grns and 12.6 grns og IMR 4198. COL @2.230.
Sub and just over sonic.
Ran just OK and cycled the bolt mostly. Probably short stroking.
I'll shorten the OAL a bit.
I didn't deburr the cases and on further review there's a bit on the case rim that should get removed in my newb opinion.
Comment, suggestions, ridicule?
Let us know how they shoot. My PP shoot as well as my GG. Not like I’m a marksman or anything but I think if I messed up it would be a shotgun pattern.Loaded some .43 Spanish with a paper patched bullet. It takes a bit of trial and error to find the right diameter to shoot well and still not be too large in diameter to load easily into the case. I think I'm there. The bullet is a Lyman 439186 sized to .427 with 2 wraps of printer paper and the charge is 23 grains of AA5744. I haven't tried a mold specifically for paper patched bullets but according to "The Paper Jacket" it doesn't matter.
11-1/2" barrel pistol AR.Shoot a single round at a time. See if she locks the bolt back or not.
Adjustable gas block?
On your reloads are you converting 5.56 or using 300 blackout brass?
What buffer?
Mess with different powders too. Of course you want it to run with a lot of different loads and not to be too finicky. I really liked CFE BLK.11-1/2" barrel pistol AR.
This one is all PSA upper and lower. Fin brace. Full gas.
No mods. Carbine spring and buffer.
I started with one, then two rounds of each flavor. Then five.
Surefeed aluminum and Magpul poly mags.
The COL is really long in those mags.
Brass is reconditioned factory 300BLK. Different headstamps but trimmed to a consistent length.
I'll have to see if I can hunt up some factory subs and compare lengths.
Guess a chronograph would help but budget is busted right now.
This was all a " can you do this and have it go bang" as opposed to dialing it in for a specific gun.
Next build is a 16" in 300Blk.
Already have most of the parts for that. Try some round specific mags and see if it makes a difference in reliability as well.
I think it's your powder choice. I'm pretty sure your getting short stroking causing the stovepiping. 300BLK subsonic work gets very fussy with powder burn speed and pressure. Pretty much the goto powder for 200+ gr subs is AA1680 . What's your gas length system ? I'm running pistol length gas system on my 16" carbine rifle as I only really shoot suppressed subs. Last question are you running a true dedicated 300BLK mag ? I tried stuffing 220 gr subs into a standard 556 mag and the rounds were rubbing and causing feeding resistence and FTF's . Here's a screenshot of my testing.First batch of 300BLK went to the range yesterday. Minor issues on FTF and stovepipe.
It's the gun not the loads as I used factory ammo as a control group with same issues on that.
Reloads were 220 grn Berry's over 10.8 grns and 12.6 grns og IMR 4198. COL @2.230.
Sub and just over sonic.
Ran just OK and cycled the bolt mostly. Probably short stroking.
I'll shorten the OAL a bit.
I didn't deburr the cases and on further review there's a bit on the case rim that should get removed in my newb opinion.
Comment, suggestions, ridicule?
Mess with different powders too. Of course you want it to run with a lot of different loads and not to be too finicky. I really liked CFE BLK.
I think it's your powder choice. I'm pretty sure your getting short stroking causing the stovepiping. 300BLK subsonic work gets very fussy with powder burn speed and pressure. Pretty much the goto powder for 200+ gr subs is AA1680 . What's your gas length system ? I'm running pistol length gas system on my 16" carbine rifle as I only really shoot suppressed subs. Last question are you running a true dedicated 300BLK mag ? I tried stuffing 220 gr subs into a standard 556 mag and the rounds were rubbing and causing feeding resistence and FTF's . Here's a screenshot of my testing.
View attachment 634099
I would first try a Magpul dedicated 300BLK mag and see if that stops the stovepiping easy change and don't have to try a different powder. . It's possible 4198 will work with subs. Try only one change at a time so you know if gained positive progress. Good luck hope you get your rig running. My 300BLK franken build is a super reliable subsonic cycler (once I figured out the 556 mag feeding issue ) my stealthy 300blk NV rabbit sniper stickI couldn't find any CFE BLK when I ordered the 4198.
Probably would have been my first choice for obvious reasons.
Different powders are not a problem if I can find them.
I can go higher on the charge weight up to a point on the 220s as well.
Just plinking ammo.
No I haven't tried dedicated mags yet. I put like a hundred or two rounds through it when I built it. Both sub and super factory ammo in .556 mags.
The only issues I had mag related were from a Hexmag I bought at a gun show. It promptly went in the trash.
I will get som 300BLK mags tho.
Thanks for the chart Road_Clam
Monadnock Firearms has one #8 jug of CFE BLK available. You can order online and pick up in store or have it shipped.I couldn't find any CFE BLK when I ordered the 4198.
Probably would have been my first choice for obvious reasons.
Different powders are not a problem if I can find them.
I can go higher on the charge weight up to a point on the 220s as well.
Just plinking ammo.
No I haven't tried dedicated mags yet. I put like a hundred or two rounds through it when I built it. Both sub and super factory ammo in .556 mags.
The only issues I had mag related were from a Hexmag I bought at a gun show. It promptly went in the trash.
I will get som 300BLK mags tho.
Thanks for the chart Road_Clam
I had mag issues with subs also because they’re pretty fat up in the area where the neck of the 5.56 case should be. Make sure you’re not getting stuck in that area at all.I couldn't find any CFE BLK when I ordered the 4198.
Probably would have been my first choice for obvious reasons.
Different powders are not a problem if I can find them.
I can go higher on the charge weight up to a point on the 220s as well.
Just plinking ammo.
No I haven't tried dedicated mags yet. I put like a hundred or two rounds through it when I built it. Both sub and super factory ammo in .556 mags.
The only issues I had mag related were from a Hexmag I bought at a gun show. It promptly went in the trash.
I will get som 300BLK mags tho.
Thanks for the chart Road_Clam
Weldon bit works better than swage, at least I think so.What order does every one process .223/5.56? I’ve been doing decap/size, swage, trim, then prime, but I’ve noticed the swagging rod/die will mess with the neck/shoulder.
Should I decap, swage, size, then trim?