5.56 converted to 300 blackout?

[DIYARCHERYJUNKIE]

I've read on multiple other forums that all you have to do is swap barrels.  Is this true and besides being able to hunt with a 300 blackout round what advantage or disadvantages does the round have? 

[carpsniperg2]

Yep all you need is a barrel swap out. Runs using the same 223 bcg.

The 300blk out is not the best pick for hunting big game in the ar-15 but it most certainly will work.

Brass is pretty easy to make yourself with the right tools from 223 brass.

The biggest advantage of the round is being able to load the subsonic's for us guys who are running suppressors.

[DIYARCHERYJUNKIE]

What other calibers are better for hunting that will fit the ar15?  What other parts besides a barrel would I need for these different calibers?

[carpsniperg2]

The 6.5 Grendel is a great choice as well as 243wssm which is a monster in the ar15. Both would require a new barrel and bcg upgrades.

A really simple one that is a great choice is the 6mm-223. Swap a barrel and you are good to go. Super easy to neck a 223 up to 6mm. Good choice of bullets as well.

[Blacklab]

I'm not bias at all honest  Grendel is a hands down a great choice for hunting. The ballistics after 200 yards are outstanding. But remember I'm not bias 

[Biggerhammer]

I'm not bias at all honest  Grendel is a hands down a great choice for hunting. The ballistics after 200 yards are outstanding. But remember I'm not bias 

 

[DIYARCHERYJUNKIE]

The six five sounds like the right answer.  So I buy the barrel and bcg upgrades?  What are those. Where would have them for cheapest online and what price is fair?  What will be the cost to get it put together after I get it? Thanks for the help

[Biggerhammer]

All you need is a barrel, a Grendel bolt & a magazine. You can get barrels from Shilen, AA & Satern. Check Midway USA and Brownells. They get regular shipments of 6.5 Grendel barrels from the major makers, usualy these barrels come with a matching bolt. You need to be quick, put yourself on "Notification" on Midway, they go in a hurry. You can order one but there is a wait, I've been waiting on a custom Grendel barrel from Satern since last Oct. Rainier Arms has Grendel mags in stock last I checked 17.00 bucks or so.

[Blacklab]

lilja  produces Grendel also. you want a AR15 drop in barrel with matching bolt.

Here's a Grendel web site/forum million years of experience 

www.65grendel.com 
There's also 2 books to be had there. Also about the Grendel. Volume 2 a lot of info plus load data. I highly recommend getting them 

[Heredoggydoggy]

The 6.5 Grendel or the 6.8 SPC are good hunting cartridges, and legal for Big Game in this State.  The .300 blackout was developed mainly as a sub-sonic round for suppressed rifles.  There are hunting loads available, but as a Big Game gun, you'd be just as well off with a 30-30. 

[stuckalot]

The 6.5 Grendel or the 6.8 SPC are good hunting cartridges, and legal for Big Game in this State.  The .300 blackout was developed mainly as a sub-sonic round for suppressed rifles.  There are hunting loads available, but as a Big Game gun, you'd be just as well off with a 30-30. 

Which is one of the benefits of the 300blk it's only a couple steps behind the 30-30 and it runs in an ar platform easily. For those that feel the 5.56 is "anaemic" it matches the 7.62x39 ballistics.

In my opinion 6x45 is what the m16 should have been.

[DIYARCHERYJUNKIE]

I'm gonna go Grendel.  I have been looking at huskamaw scopes as well.  Any tips on the huskamaws.  I've seen a few for 1500 ish.  Is that about what a huskamaw scope is gonna run me?  This gun was my stepfathers and I want to convert it to a precise hunting rifle.  The 6.5 seems like the easy way to do so.  Its a colt with all magpull.  It's a le69 something.  Very nice ar15 with less than 1000 rounds through it.  I will also be getting a bipod for it.  I was thinking a longer bi pod that can be shot sitting up.  Thanks for all the help.  Any suggestions on scope choice by huskamaw?

[Blacklab]

I really think your going to enjoy the Grendel  As for the scope you mention no clue 

[Heredoggydoggy]

Never heard of Huskemaw scopes, but there are so many new scope brands on the market these days.  Seems like everyone is slapping their name on a Chinese-made scope...   

[hillbilli]

advantages of the .300 blackout (whisper) is same mag and bolt as std AR.. just requires a barrel change, and it's ability to run subsonic functioning load for suppressors.. disadvantage is ballistics are 7.62x39 (123@2350/208@1100).. works for deer, wouldn't use it on anything bigger. 6.5 Grendel uppers are also sold under the name '6.5 sporter' by Model one sales, and others..

[huntandjeep]

Huskemah are good scopes that's what Best of the West use as there long range optic. They've been around for a while $1500 is normal unless you find a used one ( sniper hide.com classifieds).

[DIYARCHERYJUNKIE]

Yeah I have been on sniper hide and all those guys talk down on the huskamaw scopes.  They say that the elevation gain and tempature changes affect the pre configured turrets.  I don't see it being to big of a difference out to 600 yards but who knows. 

[Biggerhammer]

Yeah I have been on sniper hide and all those guys talk down on the huskamaw scopes.  They say that the elevation gain and tempature changes affect the pre configured turrets.  I don't see it being to big of a difference out to 600 yards but who knows.

It means allot lot when your a die hard varmint hunter, trying to make a first round hit on a Rockchuck laying flat sunning himself at that range. Not so much if your shooting at a big piece of steel.

[DIYARCHERYJUNKIE]

Well I plan on hunting with it.  Not so much rockchucks but big game.  So I would like to be able to hit a rockchuck sized target on the side of a big mule deer sunning himself when I get through putting it together.  I can hit a beer bottle at 100 yards with the iron sight I have on it now.  It has a holographic deal on there as well I just don't use it to much.  I've only ran 500 rounds through it and before that I think it was unfired.  My stepfather bought it before he passed away.  I feel it's required to put it to good use and kill some deer with it.  So what does everyone think about the 6.5 Grendel for elk hunting? 

[jay.sharkbait]

I'd kill an Elk with 6.5G

[Blacklab]

I'd kill an Elk with 6.5G

 
In a heart beat! 

[Biggerhammer]

I'd kill an Elk with 6.5G

 
In a heart beat! 

Same here.

[mountainman]

Well I plan on hunting with it.  Not so much rockchucks but big game.  So I would like to be able to hit a rockchuck sized target on the side of a big mule deer sunning himself when I get through putting it together.  I can hit a beer bottle at 100 yards with the iron sight I have on it now.  It has a holographic deal on there as well I just don't use it to much.  I've only ran 500 rounds through it and before that I think it was unfired.  My stepfather bought it before he passed away.  I feel it's required to put it to good use and kill some deer with it.  So what does everyone think about the 6.5 Grendel for elk hunting? 

if my long bows can kill them, a Grendell surely can! it's. All about that accurate first shot. Hit it in the leg, or the nose, they will run off. Put it in the vitals, your packing elk meat! Huskemaw makes fine scopes for the price. Put one on top, then go makes some memories and do your stepfather proud!!

[CastleRocker]

Can't speak as to the effectiveness of the 6.5G on elk, but my wife has shot her last two antelope with her 6.5 Grendel, and it didn't look like either animal liked it at all.

I use a DTech (Mike Milli) built upper in 25WSSM for antelope, and it does the job as well.

Currently trying to wring out a 6mmAR, which is the 6.5 Grendel necked back down and is pretty close to the old 6mmPPC.  Robert Whitley supposedly has laid claim to the "invention" of the 6mmAR, and to his credit, does put together some VERY accurate uppers. 

I shot two deer in AK with my Contender in the early '80's with a very, very accurate 6.5 TCU barrel, that I used to shoot metallic silhouette with.  (That's a 223/5.56 necked up to 6.5mm and fireformed).  The one that was shot through the lungs, was NOT impressive at all.  It took two shots through the lungs.  Entrance holes were about an inch and a half apart, both exited out the same hole as one clipped a rib.  The range was around 135 yards when we paced it off.  The animal gave NO indication it was hit on the first shot.  The other deer ran off to about 75 yards and took one shot between the eyes.  I was NOT impressed with that round for a hunting gun, and I've shot no big game with it since.  I still have the barrel though as it is still one of the best shooting barrels I've ever owned.


 

[CastleRocker]

As far as the original question...it's easy.  You will need a wrench,  Sportsman's Guide, Brownells, Midway, and many others sell them.  A torque wrench, an allen, if your gas block has set screws or clamps.  A vice block will help a lot as well. 

There are probably plenty of Youtube videos showing how and how not to change barrels.

As far as the caliber goes...I have an upper in 300 Blackout, (as others have said, it was called the "Whisper" 20+ years ago in silhouette circles, before it too was re-invented).  I wouldn't shoot anything over 100lbs, or over 75yds away with it.  The bullets that I shoot anyway, won't expand at that low velocity.  I honestly believe a broadhead would do WAY more damage. 

[DIYARCHERYJUNKIE]

A majority of my hunting will be with my bow for elk.  I would use this rifle for deer mainly.  I like the archery season for elk and that was the reason I even started bow hunting.  I like the rifle season for deer though.  I'm sure a 6.5 Grendel can kill deer one well placed shot.  I'll get some pics of my current setup.  Then some when I'm done.

[Biggerhammer]

A majority of my hunting will be with my bow for elk.  I would use this rifle for deer mainly.  I like the archery season for elk and that was the reason I even started bow hunting.  I like the rifle season for deer though.  I'm sure a 6.5 Grendel can kill deer one well placed shot.  I'll get some pics of my current setup.  Then some when I'm done.

I've personally witnessed a 16" Grendel carbine take a Mulie clean at 496 yards.