So I finally got my 10mm DI together. The upper from Macon Armory took like 9 months, but it's finally mated with an Angstadt Arms lower. ;D
It eats (almost) everything I put into it. FMJ handloads, factory ammo, and even some cast boolits. The only issue involved some handloads I had made with AA #9 stovepiping (165gr FMJ 14.7gr AA #9). I'm thinking maybe the slower burn rate is messing with the timing. Other than that, it eats everything. I am having an issue with the last round bolt hold open, but I think that's a part issue.
(https://i.postimg.cc/Dz8QG9zf/IMG-9417.jpg)
Yes, I live in a non-free state, so please excuse the fin grip.
(https://i.postimg.cc/90tyVVLb/IMG-9421.jpg)
(https://i.postimg.cc/rsL5vzNz/IMG-9422.jpg)
(https://i.postimg.cc/nzmvRq76/IMG-9424.jpg)
Looking forward to shooting some of my cheap powdercoated rounds through it.
(https://i.postimg.cc/kGQYZBLg/IMG-9429.jpg)
Looks nice.
Word of caution...Plain base cast bullets and gas systems don't play nice together. Powder coat or gas check should be fine.
Quote from: sqlbullet on May 07 2021 04:04:08 PM MDT
Looks nice.
Word of caution...Plain base cast bullets and gas systems don't play nice together. Powder coat or gas check should be fine.
Thanks. Impatiently awaiting my gas check maker die(s). The lubed cast boolits I sent had gas checks.
I tried plain base 30 cal in my M1 Garand hoping (stupidly) to save a penny or two more per shot. After 1 clip the op rod wouldn't cycle correctly. I was very concerned that I had bent it, but it turned out to just be lead build up in the gas cylinder. That was enough to convince me.
Gas checks work great. I have read that powder coat does great too, but I consider a bit of copper on the base good insurance for guns that are nearly 80 years old.
Quote from: sqlbullet on May 10 2021 07:48:15 AM MDT
I tried plain base 30 cal in my M1 Garand hoping (stupidly) to save a penny or two more per shot. After 1 clip the op rod wouldn't cycle correctly. I was very concerned that I had bent it, but it turned out to just be lead build up in the gas cylinder. That was enough to convince me.
Gas checks work great. I have read that powder coat does great too, but I consider a bit of copper on the base good insurance for guns that are nearly 80 years old.
Yeah that seems to be the big fear with Desert Eagles (I have one), that the cylinder will get clogged, a very difficult fix in a DE. But there's a guy on YouTube who shoots powder coated 50AE without issue (he gas checks):
https://www.youtube.com/watch?v=Zepp97UwCSs
I have a 50 gas check die coming, along with my 10mm one. Better safe than sorry!
Love the full.lead.taco's channel. His tastes and mine run very similar.
I also have a DE and have avoided cast bullets in 50 AE. I have conversion barrels for 44 mag and 429 DE so I will probably run powder coat for those when I get to them.
Intriguing rig! If possible, could you post a photo of the bolt/bolt carrier. Just curious about its design.
Thanks!
Mark
Not the OP, but it is a DI BCG. It is actually probably just a 6.8 SPC BCG. Case head diameter is only .003" different than 10mm. 6.5 Grendel probably would work too.
Ah ha! Thanks, sqlbullet. What I was leading up to was to ask what the engineering obstacles might be in such an outfit. The BCG matches up conveniently for this application but I'm sure there are other considerations of which I'm not aware. It seems that all the wizardry would be in fab'ing a 10mm barrel with the standard AR DI features. Could this just drop on a suitable (pistol magazine) lower?
Mark
Yes, this upper should run on any AR lower with a suitable magazine system.
I am not a novice, or an expert, at AR building. I have built enough to know that it's about pressure and dwell. I would guess they use a pistol length gas system with a gas port in the .089-.096" range. The proximity of the gas port to the chamber should give it the best shot at pressure, and a healthy port size gives it enough volume to do some work.
You've done a great job! The gun looks amazing. I thought about buying myself the same model last year, but I exceeded my expenses, so I could not allocate money for a new weapon. At the moment I am using Beretta 486 Parallelo. While maintaining the traditional quality of the finish and the style, Beretta offers us a cold-forged block of trunks soldered using Triblock technology, ensuring high rigidity of the connection. I bought this gun three years ago at https://walkeroutdoors.net/product/bergara-bxr-22lr-semi-auto/ (https://walkeroutdoors.net/product/bergara-bxr-22lr-semi-auto/), and I'm still happy.
Welcome Somachef, cool .22 by the way
I have the same Bergara with a standard barrel. Suppressed, it's a gopher killing machine and is everything the 10/22 should have been initially.
Mark
Just an update. After working on some things with Rudy at Macon Armory (http://"https://maconarmory.com/product/10mm-upper-receiver-group-di/"), mostly using a heavier buffer, and Rudy expanding the ejection port a bit, this thing eats (and poops out) anything and everything. I'm going to get the 45 ACP DI upper as well soon.
Currently with a Vortex Spitfire 3X Prism (http://"https://vortexoptics.com/vortex-spitfire-3x-ebr556b-moa-prism-scope.html") optic, although I am really liking the smaller and lighter Primary Arms MicroPrism (http://"https://www.primaryarms.com/primary-arms-slx-3x-microprism-with-red-illuminated-acss-raptor-556-308-reticle-yard") on my Sig MPX.
Also swapped in a "Gas Buster" charging handle (http://"https://www.midwayusa.com/product/1021433447?pid=657720&utm_medium=email&utm_source=service&utm_campaign=shipping-confirmation&utm_content=product-shipped-today-product-description-link") because I was getting some gas in the face. Solved that problem.
(https://i.postimg.cc/2SNV65YM/IMG-0551.jpg)
Some chrono info:
165gr FMJ 14.7 Accurate #9 1504-1508
180gr FMJ 10.9 Blue Dot 1406-1424 1 @ 1447.
187gr cast/PC 9.9gr Blue Dot 1368-1343 (I'm sure I can go hotter, but flying blind due to the weird weight).
Some pics of my cast and powdercoated 187gr boolits:
(https://i.postimg.cc/YqYQ8ZCc/IMG-0548.jpg)
The aluminum are handmade from Matteson's checkmaker die (.011 and .014 flashing). The copper are Sage's checks.
(https://i.postimg.cc/DfWNfvBq/IMG-0550.jpg)
The one on the far right is an old school Lee 175gr lubed boolit I first used for my 40 S&W, smokey AF! Fun to shoot out of my Glock 29 with comp barrel.
Nice looken boolit / PC job 😀
Quote from: redial on November 04 2022 08:37:40 PM MDT
Ah ha! Thanks, sqlbullet. What I was leading up to was to ask what the engineering obstacles might be in such an outfit. The BCG matches up conveniently for this application but I'm sure there are other considerations of which I'm not aware. It seems that all the wizardry would be in fab'ing a 10mm barrel with the standard AR DI features. Could this just drop on a suitable (pistol magazine) lower?
Mark
It is a std BCG setup for DI but there are special milling on the bottom of the carrier for clearance and proper feeding using the pistol mags that is completely different than and DI AR15 using std 556 mags.
I have a DI 10mm from Macon also. I installed a Rubber City adjustable gas key and using the real heavy CMMG buffer I can run the heaviest loads without any case bulging now. If I want to run std or light loads, I simply use an H3 or H buffer and not touch the adjustable gas key.
All of that on a CMMG Banshee lower. I?m a lefty and the severe case bulging was just to unnerving for me looking into the ejection port. So Rudy built me a great DI upper and dropped it onto my CMMG lower.
Awesome weapon!
Steve
Thanks Steve! That's what I was sorta figuring.
Mark
Plot twist!
The 400 Legend, designed for ARs. A lengthened 10mm case, 2.26" cartridge OAL and claimed ballistics of a 215 gr bullet at 2300+! Uses ordinary 223 lower, likely similar magazines and a 6.8 bolt!
VERY interested to see how this develops.
Mark
Quote from: Teninator on November 25 2022 07:24:48 PM MST
Just an update. After working on some things with Rudy mostly using a heavier buffer, and Rudy expanding the ejection port a bit, this thing eats (and poops out) anything and everything. I'm going to get the 45 ACP DI upper as well soon.
Some chrono info:
165gr FMJ 14.7 Accurate #9 1504-1508
180gr FMJ 10.9 Blue Dot 1406-1424 1 @ 1447.
187gr cast/PC 9.9gr Blue Dot 1368-1343 (I'm sure I can go hotter, but flying blind due to the weird weight).
Rudy has really good CS. I've spoken to him a couple of times on arfcom but opted to build my own. Which was the right decision for me. I was able to have it working from the get-go using various parts and pieces from different manufacturers. The only thing I have found is seating the bullets too short can cause feeding issues, but that's not really a specific gun problem and more just the angle that it feeds from the magazine with the lower that I'm using.
Were you able to get the 45acp yet? That's another that I did. To be honest, I did my 45 before I did the 10mm. The 45acp is the one that sits beside of my bed for bumps in the night. It's a beast and will run anything that I put through it, even including those light 4 grain clays powder loads under 230's that are so slow you can even watch them go downrange when you are in the right angle and amount of sunlight ha ha.
And I've ran +P 230's out of it all the same pushing right at 1000 fps, which is moving along for a 45acp. Even considered trying to load some 45SMC bullets for it. Though, I made mine more for a nice suppressed upper rather than squeezing every bit of power out of it that I can. So, the +P's are what I keep in it and it's really nice.
Very nice. I thought about a 10 mm AR build but went with the TNW ASR in the end for a few hundred less. SO far, I am really liking the TNW so no regrets yet.