So who's going to convert their AR to 300 Ham'r?

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While I haven't noticed a bit of difference between 55-75 gr accuracy in my 1/9 and 1/7 twist 5.56 barrels, I have a hell of a time with <150gr. factory ammo in my 1/10 .308 barrel. Not sure why, in theory it shouldn't be an issue.

CoalTrain49 said:
I'm just researching 300 something or other. I'm not having any issues per say. I know twist rate has a lot to do with bullet weight and stabilizing those bullets. If you notice most .223 bolt guns have a 1/9 twist. Originally I think a lot of them were 1/12. AR's are mostly 1/7. The reason I think is the military decided that 1/7 was much better for the heavier bullets they are now using. Everyone wants what the military uses so 1/7 became popular. My experience is that an AR with a 1/7 twist doesn't handle 55 grain bullets as well as 170. I have a friend that shoots several 5.56 AR's a lot.

Because I don't have a 300 BLK I'm just asking a lot of questions and getting some opinions.
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morcey2 said:
Someone ought to neck up the 6.5 Grendel to .30 cal and see what it does.
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Been done. .30 ARX, brought to you by the same dude as the 6mm AR and Turbo40. What it does - shoots the same bullet weight as the Grendel, but with worse BC and SD’s. It does out pace the Blackout, but that’s not really saying much.
 
I wouldn't be apposed to this new caliber, but I waited a long time to get into the .300 Blackout, and I did that for a reason. I don't reload. I don't every plan to reload. I wanted to make sure it was going to be a commercially stable round that would be available when I needed it. I like the concept here, It sounds similar to what they were first saying about the Blackout before everybody went nuts for subsonic rounds. I was never interested in shooting subsonic rounds in my .300 blackout.

I got into the Blackout because the 5.56 gives up so much in short SBRs. I wanted to rebarrel my SBR to gain some of that lost power. I use the Vortex 110 gr round as my home defense round, and 150, or 147 gr FMJ to practice with. If this take off, we'll see, but unless it's a round that's picked up by other ammo makers... no way in hell. I need that free market competition to get prices down. .277 Wolverine, same deal. Sorry. Until it's a commercially available round, nope. I have my SBR right where I want it now, and it shoots very well. (with a Wilson Combat 11.3' barrel by the way) My .300 Blackout SBR with supersonic rounds are good to go as far as I'm concerned for a short range (<200 yds) defensive gun. That's all I need.
 
Maybe someone should neck a .300 HAM'R down to 5.56, I wonder what that would be like? :scrutiny:

morcey2 said:
Someone ought to neck up the 6.5 Grendel to .30 cal and see what it does. There's gotta be some sort of market for that out there. Maybe run it at a little lower pressure so that it doesn't have potential bolt failure issues that the Grendel can have.

:scrutiny: :what: :neener: :evil:

Matt
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in response to post 3 https://www.elitetacticalcomponents...dium-Conto-p/etc-vdibrl-16-c-300blk-m-t-l.htm I have this barrel, and its more accurate than I can shoot it, but its on an A2 upper, so I don't know what it would do with a scope, but i shoot 30 carbing bullets at 2100FPS, and its 5" or so at 100 yards (real yards, not the internet standard "pretend the 40 feet is 100 yards" kind, with the A2 iron sights, GI trigger, and me not being a great shooter these days I know thats not great, but I still haven't met any of the "I can shoot MOA offhand, iron sights" in real life to let them wring it out. I hope to sometime. I get 110 Vmax bullets to 2370FPS 10' from the muzzle using published loads. As far as the "Ham'r", seems kinda silly, and the whole "from a standard bolt"... my understanding is that the BO is already kept lower than necessary pressure to keep the bolt from wearing out at a few thousand rounds. 5.56 bolts are supposed to be known to fail at 7000 or so, so putting 30-30 power on one seems iffy to me . Also, cant see id doing anything the 30BO cant do, excepts squeeze some range, but not all that much.
 
I just got a 300BLK rifle last year and only recently got a 30 cal suppressor. I have no intention of buying supersonic 300 BLK ammo ever again. I have too many other options if I want something more powerful.
 
I had forgotten all about this but here is a prototype 30-223 round I made last year. The concept for this is I wanted to make a large capacity 30 caliber 223 based round for a contender carbine. Contenders are bolt thrust limited so the largest case that you can run up to the 60,000 psi range is a 223 bolt head. With that in mind I wanted something with a bit more oomph than the blackout so I made this. I made a chamber drawing for it with blown out shoulders and was going to call it the 30 TCU, in homage to the 6, 6.5, and 7 TCU's. I eventually decided I would step it up another notch and base it off a 222 magnum but I lost intrest.

223 left, 300 blk middle, 30 whatchamacallit right

1_B63_DC82-76_EA-40_F9-_BE69-_BD8_CDACAB933.jpg
 
Like Space Ghost, I like the 300aac for lightweight, supersonic bullets in pistol length barrels. I have an 8" that is my HD weapon - a 110g VMAX pushed to almost 2200fps with no recoil or flash provides enough power without the overkill that a .308 would be, and quite frankly the 5.56 in anything under a 16" barrel doesn't do much for me. I figure SD range at home doesn't exceed 50 feet, so BC and effective range are irrelevant. Plus 5.56 is very, very loud out of short barrels.

Before I built the pistol, I built a 16" 300aac to be a hog hunting rifle. It's light and handy with a Nikon 300aac scope, and a 125g SST makes about 2400 fps, which is plenty for hogs...or is it?? The 16" barrel might be my next sale - the other calibers that I could drop in to this upper seem more and more compelling as I understand the round better. Where I live there is no sense wasting energy with subsonic, as I cannot get a suppressor. The Ham'r doesn't appeal to me either, since I'm not sure a few hundred FPS would solve the problem I have - that a fat, moderately fast bullet with a crap BC just can't make it out too far past 200m. Something in a similar build that could hustle out to 400 yards would be perfect - I'm looking pretty hard at the grendel and 6.8, but it seems like they have some substantial compromises to make range. I'm not really sure where a slightly faster 300aac fits into my arsenal.
 
Sushigaijin said:
Like Space Ghost, I like the 300aac for lightweight, supersonic bullets in pistol length barrels. I have an 8" that is my HD weapon - a 110g VMAX pushed to almost 2200fps with no recoil or flash provides enough power without the overkill that a .308 would be, and quite frankly the 5.56 in anything under a 16" barrel doesn't do much for me. I figure SD range at home doesn't exceed 50 feet, so BC and effective range are irrelevant. Plus 5.56 is very, very loud out of short barrels.

Before I built the pistol, I built a 16" 300aac to be a hog hunting rifle. It's light and handy with a Nikon 300aac scope, and a 125g SST makes about 2400 fps, which is plenty for hogs...or is it?? The 16" barrel might be my next sale - the other calibers that I could drop in to this upper seem more and more compelling as I understand the round better. Where I live there is no sense wasting energy with subsonic, as I cannot get a suppressor. The Ham'r doesn't appeal to me either, since I'm not sure a few hundred FPS would solve the problem I have - that a fat, moderately fast bullet with a crap BC just can't make it out too far past 200m. Something in a similar build that could hustle out to 400 yards would be perfect - I'm looking pretty hard at the grendel and 6.8, but it seems like they have some substantial compromises to make range. I'm not really sure where a slightly faster 300aac fits into my arsenal.
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Personally I think if your looking to shoot anything bigger than a coyote at 400 yards the AR15 isn’t the platform.
 
It makes more sense to be as ".30-30AR" since that describes a slightly more useful niche (for want of a better term). The "ham'r" just looks gimmicky to me--but, that's a personal bias.

I keep waiting for somebody to introduce the next new "wonder round" in, oh, 7x45 (.280nato) or 7x47 (.276pedersen); or even 7x55 (.276enfield). The more the world changes, the more it stays the same.
 
I always liked the Two Ninty Niche. It has a much better sectional density and can be driven faster for better terminal effect.
Or go slow and quiet, like its ever so slightly larger sibling.
For home defense it can be fired through a thirty caliber barrel to induce tumbling at very short ranges. A No-Go for suppressors, in that configuration.

The crux of the matter was finding no commercially made bullets in a reasonable price range. Twenty nine caliber bullets make fourteen caliber bullets seem cheap!

Well, that and Two Ninty Niche marketing must be a niche market, there were no marketers to spiel my Niche to the Marks whose niches needed filling.


:)
 
It seems like every time something new comes out, folks fall all over each other trying to be the first one to properly criticize it. I hate that and try to approach everything with an open mind. That said, I'm really struggling with this one. The whole point of the .300BO is that it does well at BOTH subsonic velocity with heavy bullets and lighter bullets at supersonic velocities. Other cartridges may do better at either but nothing does BOTH as well as the .300BO. Now you've taken one away and IMHO, it was the most important of the two. All these newfangled cartridges that are claimed to duplicate the .30-30 never really do. Which tells me that the .30-30 should still be at the top of the list for utility/deer/hog cartridges. You want a ranch cartridge that fits the standard AR platform, okay. The 6.5, 6.8, .300BO or .450BM already cover those bases. The HAMR doesn't stand out among that crowd in any way. It's also worthy of note that if I want .30-30 performance in an every day use rifle, it would be a .30-30 levergun. While I have two AR's and enjoy them, it's a lot of wishful thinking that they carry and handle better than a leveraction carbine. Not even close.

Oh and I almost forgot, you dummies need to catch up. I learned on Facebook that the .450BM is a 400yd cartridge so you need to just forget everything else. :p
 
@<*(((><

Varminterror said:
which AR-10 worth owning is only $480 right now?
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I don’t suffer from mil-spec madness. By the time I put a decent trigger, proper barrel, better stock, ditch the sight post, and float the barrel - aka, make it worth owning - I’ll be in for more cost than a good AR-10 off of the shelf, and will still be holding a PSA branded lower.
 
I wasn’t implying the PSA offering is the route I would go for an AR10, because it isn’t. But the reviews online are good on it and no doubt I’m sure it would provide the basic needs for an AR10.
 
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