7.62x39 vs 300AAC vs 6.5 Grendel

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Re: 7.62x39 vs 300AAC vs 6.5 Grendel

Post by JimTom » 27 Feb 2019, 7:16 pm

wanneroo wrote:
JimTom wrote:
wanneroo wrote:I'm building a new 300 Blackout AR-15. This will be my first AR build rather than buying a rifle off the shelf. I bought a stripped Anderson lower for $60, a Palmetto State parts kit for $369 that includes a complete upper with bolt carrier group and a complete set of lower receiver parts to install in the lower plus the butt stock, a Magpul fore grip for $25, a Sig Sauer red dot Romeo 5 for $119 and an O-Light 1200 lumen gun light for $59. Basically just wanted a simple rifle to use as a rifle around the property, to put in the car or for home defense and one that was cheap enough I could bang it up and not worry about it.


Mate that sounds like a good little project. No chance of doing that here in Aus. Would appreciate seeing a picture or two of the finished product if you get the chance to put one up. :thumbsup:


I might end up doing a Youtube series on it. I'm going to be curious to see what accuracy I get out of this rifle compared to the other rifle.


If you do the TubeFace thing let us now the details mate, I’d be keen to watch it.
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Re: 7.62x39 vs 300AAC vs 6.5 Grendel

Post by wanneroo » 01 Apr 2019, 2:53 am

Well here you go, the AR-15 I built. We have an up and coming company here in the USA called Palmetto State Armory that sells quality but affordable AR and AK rifles and kits. Most of their barrels are made by FN Herstal.

We've got a 300 Blackout rifle kit here, 16 inch barrel, M-Lok handguard, standard AR-15/M-4 parts such as bolt carrier group, stock, grip, etc. The kit comes with a complete upper and a lower parts kit. You supply your own lower receiver. I bought an Anderson lower for $60 and assembled it myself with basic tools and punches. Mostly it is a selection of pins and springs used to hold everything together.

For a sight I went with a Sig Sauer Romeo 5 red dot since I don't really plan on shooting beyond 100 metres with this. $119 for that and it has a reputation for being very durable. I sighted it at 50 metres and got a group of around an inch so 2 MOA at 100 is fine. At some point when I build an AR Blackout pistol I might switch this sight to that and put another scope or sight on this rifle.

Also added a Magpul fore grip and an Olight weapon light with quick detach lever. I'd like to add a magazine pouch to the rear stock as I would like to keep a magazine with the rifle so I have two options, subsonic expanding bullets and lighter copper solid bullets.

Total cost I think came in around $650 US$

These days kits and lowers are so cheap a rifle can be built for a couple hundred bucks with no accessories so I plan on acquiring a few more lower receivers and kits. I think next will be a 300 Blackout AR-15 "pistol" and a regular 5.56mm M4 type AR-15 rifle.
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Re: 7.62x39 vs 300AAC vs 6.5 Grendel

Post by JimTom » 01 Apr 2019, 5:01 am

Good job mate.
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Re: 7.62x39 vs 300AAC vs 6.5 Grendel

Post by SCJ429 » 01 Apr 2019, 7:29 pm

What is the big knob hanging down under the fore end?
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Re: 7.62x39 vs 300AAC vs 6.5 Grendel

Post by wanneroo » 01 Apr 2019, 11:23 pm

SCJ429 wrote:What is the big knob hanging down under the fore end?


It's a Magpul fore grip. They were more popular 10-15 years ago, these days angled fore grips are more common and some people just go without. I find the 90 degree angle grip more comfortable to use. You can shoot holding onto it or prop the web of your hand up against it while shooting or use it to keep good control of the rifle if you need to make your shooting hand free.
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Re: 7.62x39 vs 300AAC vs 6.5 Grendel

Post by Urastus » 18 Apr 2019, 4:56 pm

JimTom wrote:I did do a search before asking however nothing recent on this forum. A few people talking down the 300AAC as a fad. Be interested in people's thoughts, regardless of whether you own a rifle in these chamberings or not.


the 300 is made for this. Safety - if you miss, it's going to hit the ground soon. Size and weight - a 16" barrel is considered the maximum length; many in the US go with 12". And lastly, it's designed for a huge slug; piggies don't like them.
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Re: 7.62x39 vs 300AAC vs 6.5 Grendel

Post by Blr243 » 18 Apr 2019, 6:56 pm

I’m doing a bloody of extensive research on trying to get hold of quality hunting projectiles for my 300 blk when it turns up. If I find something useful I’ll share
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Re: 7.62x39 vs 300AAC vs 6.5 Grendel

Post by JimTom » 18 Apr 2019, 10:05 pm

Mate I am loading 125gn SST and getting excellent accuracy, under an inch at 100m.
Hoping they do the job on hogs just nicely.
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Re: 7.62x39 vs 300AAC vs 6.5 Grendel

Post by wanneroo » 19 Apr 2019, 11:52 pm

JimTom wrote:Mate I am loading 125gn SST and getting excellent accuracy, under an inch at 100m.
Hoping they do the job on hogs just nicely.


Interestingly was just talking to a work colleague yesterday as he does extensive loading with 300 Blackout and he's had great success with the 125g Hornady SST bullets, very accurate and has also taken 3 deer with them. He said the deer dropped right away.

I've got about 500 of those bullets so I plan on loading them as well.
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Re: 7.62x39 vs 300AAC vs 6.5 Grendel

Post by JimTom » 20 Apr 2019, 2:00 pm

Don’t think you will be disappointed mate.
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Re: 7.62x39 vs 300AAC vs 6.5 Grendel

Post by SCJ429 » 20 Apr 2019, 7:37 pm

I have never had any luck getting accuracy out of the SST. I won't buy any more of them and have turned to Noslers. The Blackout has its own challenges, I didn't realise people were using light projectiles with this case.
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Re: 7.62x39 vs 300AAC vs 6.5 Grendel

Post by Blr243 » 20 Apr 2019, 8:11 pm

After seeing Jim tom s post about the sst I looked them up and while in the process I found the Hornady short jacket varmint projectiles. So I’m going to grab a box of both styles to experiment with my 300 blk when it arrives.
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Re: 7.62x39 vs 300AAC vs 6.5 Grendel

Post by JimTom » 20 Apr 2019, 10:02 pm

SCJ429 wrote:I have never had any luck getting accuracy out of the SST. I won't buy any more of them and have turned to Noslers. The Blackout has its own challenges, I didn't realise people were using light projectiles with this case.



Mate accuracy wise the SST are great out of my blackout. I didn’t have the same success using SST out of my .308 though. I honestly cannot fault them. I am using light projectiles in the 300AAC as I am just after a short range hog buster. I know that they are mostly used with heavier projectiles to achieve subsonic loads but that’s not my cup of tea. Might have a go at it though later on down the track.
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Re: 7.62x39 vs 300AAC vs 6.5 Grendel

Post by wanneroo » 21 Apr 2019, 12:20 am

SCJ429 wrote:I have never had any luck getting accuracy out of the SST. I won't buy any more of them and have turned to Noslers. The Blackout has its own challenges, I didn't realise people were using light projectiles with this case.


I've been pretty happy with Nosler pistol bullets compared to Hornady bullets. Hornady bullets are just fine but Nosler just seems to have that little bit extra quality and consistency. I found Noslers to be very accurate. Haven't tried any of their rifle bullets yet though, however I plan too.

Yes loading 110g-130g projectiles in Blackout is common for hunting and target shooting.
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Re: 7.62x39 vs 300AAC vs 6.5 Grendel

Post by in2anity » 22 Apr 2019, 10:30 pm

wanneroo wrote:Hornady bullets are just fine but Nosler just seems to have that little bit extra quality and consistency. I found Noslers to be very accurate.


Not trying to start s***t but that’s pretty anecdotal - you gotta take it on a case by case basis - Hornady make some darn good pills as does Nosler also make some crummy ones. But you get what you pay for.
At what point does lack of maintenance become patina?
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Re: 7.62x39 vs 300AAC vs 6.5 Grendel

Post by wanneroo » 23 Apr 2019, 12:37 am

in2anity wrote:
wanneroo wrote:Hornady bullets are just fine but Nosler just seems to have that little bit extra quality and consistency. I found Noslers to be very accurate.


Not trying to start s***t but that’s pretty anecdotal - you gotta take it on a case by case basis - Hornady make some darn good pills as does Nosler also make some crummy ones. But you get what you pay for.


It is anecdotal. I've got no problem with Hornady bullets but find Noslers seem to be made with finer detail and shoot very well.

Personally because I don't do much shooting at distance due to the mountain, wooded terrain I live in, I buy in bulk by the thousands anytime there is a big sale on whatever brand of jacketed bullets, so I'm not too fussed about brands. Nosler for instance had a mega blowout sale of almost 50% of off, so I bought hundreds of pounds of bullets. Hornady did the same about 4 years ago, Speer did the same thing the following year.
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Re: 7.62x39 vs 300AAC vs 6.5 Grendel

Post by wanneroo » 23 Apr 2019, 12:40 am

Just cleaned 700 Blackout cases so will be doing some experimentation with a variety of bullets coming up over the summer months. Going to try to some fast ones, some subsonic and some bullets in the mid range for plinkers. Also aiming at some point this year to buy my first suppressor.
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Re: 7.62x39 vs 300AAC vs 6.5 Grendel

Post by JimTom » 23 Apr 2019, 3:30 am

Well that ought to keep you busy for a while mate. I’d be interested in seeing the results if you get time to chuck them up.
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