They cycle ammo fine, as long as the projectiles are FMJ or Polymer tipped (AMAX) just the same as an AR10, and as long as you feed from a G2 pmag, xcr pistol mag, or the soon to be released ATRS xcr pistol mag.
Very few people have done thorough ammo testing, and even fewer have done any load development. I have recently seen a few loads successfully group much tighter in the MH thread in ATRS' forum then cr5 suggests.
To be clear, a base model $3500 MH is the NR equivalent of a factory $1250 DPMS AR10. Because it is an entirely new design, you are paying a premium to get to that NR status. If status doesn't bother you, why are we still talking about the MH? Just go get an AR10 already and shut up!
Don't get all defensive just because you paid $5000 for yours. Two of the rifles I shot had issues with the South African bulk FMJ, to me it looked more like a magazine issue with the pistol mags but they would both push the odd round halfway out of the mag then jam and bend the cartridge and crush half of it (bolt was going over the cartridge).
The MH is a beautifully machined rifle and I love how the rear takedown pin is eliminated in the design. If it was a little more reliable and it was about $1000 less I would buy one at about gen 3 once they've worked out a couple of the small issues.
So all you've seen is pictures of good groups? Have you even shot yours yet? What are you getting for groups?
You say they are reliable with FMJ and polymer tip bullets? Your rifle is one that I've put the most rounds through (with previous owner) and it was more reliable with FMJ and polymer tip bullets but it still had the odd problem with them. We tried 9 different types of factory ammo and we put a few hundred rounds through voodoo over a couple days.
You're right, it's basically a $1200 DPMS AR-10 but with some very nice machining of their billet upper/lower and an expensive barrel, trigger and forend.
My AR-10 build was billet upper/lower with Rainier barrel and top end everything and it was around $3000 retail. It fed from any magazine and never once had a feeding issue with FMJ or polymer tip bullets and printed groups just as tight as the MH.
If the MH top model like voodoo was around $4000 instead of $5000 I would consider it a fair price including the NR tax but $5000+ is too much for what you're getting.
I would love to own one but not at that price. It's not that I couldn't afford one it's that I don't think it's worth what they're charging for a rifle I've seen the performance of first hand.
I would really like to spend some time with one and do some load development for it and see what it's really capable of. I'm guessing 3/4 moa would be possible with the odd fluke group doing slightly better.
Don't get me wrong guys, I'm nit-picking here, it's a beautiful rifle and it's extremely well made but for $4000-$5000 I expect a little more.
Rick and his crew at ATRS have done a great job bringing us another option in the NR category, I just think it needed a little more testing with different mags and ammo before they released it. Only running FGMM and their tailored handloads is one thing but a lot of guys are going to buy these and feed them cheap ammo and it should be more reliable with that stuff as well.