AR shooting 6mm

[MGYSGT]

Have an extra upper and lower sitting around. Thinking of building a 6mmAR or something along that line. Questions. I saw the 6mm Hagar complete upper, but $1400 is way outside my comfort zone for just the upper. I will be using it for local prone/single load mid range F class. Just something a little different.

1. Does that cartridge fit in the Standard AR mag with the 105/107 bullet?
2. What cartridge is used for the brass?
3. Where do you get a bolt?
4. Is a heavier BCG or buffer spring needed.
5. Who sells the barrel with the extension?


Tom

 

[highmaster82]

!.use 6.8 Rem mag
2.Hornady makes brass
3.use 6.8 Rem bolt
4.no
5. John Scandle-Keystone Accuracy
try us rifleteams forum/ nationalmatch forum for more info

 

[rcw3]

MGYSGT

As to the 6mm HAGAR, the answer to your question #1 is NO!

You cannot shoot 105/107 gr 6mm bullets mag fed from a 6mm HAGAR (disregard highmaster82's reply to #1 which is not correct).

With a 6mmAR the answer would be yes (i.e. you can shoot 105/107 gr 6mm bullets magazine fed.

 

[5spd]

6.5 grendel brass
Bolt from midwayusa (used to have) for about $85
I saw a 6mmAR on the FS forum here or over on predator masters a few months back IIRC for $1000 w/brass & dies.
They pop up here & there.

 

[highmaster82]

OK rcw jump all over me how many times has the 6mm ar won the HP National champs

 

[tonysnoo]

Have an extra upper and lower sitting around. Thinking of building a 6mmAR or something along that line. Questions. I saw the 6mm Hagar complete upper, but $1400 is way outside my comfort zone for just the upper. I will be using it for local prone/single load mid range F class. Just something a little different.

1. Does that cartridge fit in the Standard AR mag with the 105/107 bullet?
2. What cartridge is used for the brass?
3. Where do you get a bolt?
4. Is a heavier BCG or buffer spring needed.
5. Who sells the barrel with the extension?

I own both a 6mm ar 40imp and a 6mm fat rat. They are pretty amazing for consistency.
1.. yes most definitely
2..based on 6.5 grenade
3..6.5 grendel bolt
4..I like to run a carrier weight w/tubb spring, but have shot without
5.. http://6mmar.com/ or
http://www.accurateandreliablerifle.com/products.html#anchor_185

Here is a ton of info in an old thread..gets good toward the end.. http://forum.accurateshooter.com/index.php?topic=3775408.0

Good luck with what ever you build.

Tom

 

[MGYSGT]

Thanks for all the info. I will look into it. Just seems like a good addition to options.

Tom

 

[Cakes]

Both are wonderful rifles to shoot and easy to tune a load. I have two 6AR t40's and one hagar. Use them for pdogs and such so mag fed is very important to me. The 6AR has the short case length to accommodate the heavier bullets without slotting the mag. On the other hand the Hagar is handicapped by a long case length which forces one to seat even 90gr. bullets VERY deep to make mag length. The Hagar does run about 100'/sec faster in my loads but I'm forced to load 87 and 75 v-max's to reliably make mag length and also feed, this is with slotted mags.. You mentioned prone/single load. IF this is the only application you will be using it for than I'd opt for the Hagar as it has a small increase in case capacity = more speed. Robert's 6 AR's are a great cartridge and my personal favorite but I can never leave my Hagar at home either. Good Luck, Eric in DL

 

[lloydx2]

OK rcw jump all over me how many times has the 6mm ar won the HP National champs

You must be confused. Robert was talking about mag loading 105-7

 

[1shot]

I never shot a Hagar but have a 6mmAR that gave me my first 300 RF at the nationals, on an alibi string to boot. There are a lot of you that say you are supposed to "clean" the rapids, but they aren't an expert classed shooter in HP. 1 powder, same charge weight, the only difference is short line loads are mag length and 600 is seated out. BTW, it shoot constantly shoot 195-200 at 600 with 105's.
Thanks Robert for making a turn key system that brings out the best in a shooter.
Lloyd

 

[chevi_guy]

Tom
Have you looked at the 6mmar.com site? Robert Whitley has several 6mm versions that work great on 6mm AR Platform. I know his barreled actions are pricey. But he does give catrdrige specs.

Ben

 

[Rtheurer]

It might be able to be done to shoot the 105 class of bullets at Magazine Length. But you will be pushing it in the case a LONG ways and loosing a lot of case capacity and the speed you will need to over come the lighter bullet with a little less BC. In High Power XTC ( Nationals) I don't see anyone using those bullets at Magazine length. Just at 600 yards where we us it in SLOW fire single feed.

I have a 87gr VLD Berger load that is a Freaking tack driver in a Grendel based case that fits the magazine. Love that little fella.

RussT

 

[tonysnoo]

Ditto on the 87 Berger. It makes ya smile..... even out to 850.

The fat rat has a longer throat than the 6ar for single loading 105 class bullets, but we found no appreciable loss of speed running them at mag length. Actually the Berger 108 loaded at mag length is only jumping .040ish. Hybrids however jump around .090 at mag length. We have really like the consistency of the 108s with this round.

 

[SG4247]

It might be able to be done to shoot the 105 class of bullets at Magazine Length. But you will be pushing it in the case a LONG ways and loosing a lot of case capacity and the speed you will need to over come the lighter bullet with a little less BC. In High Power XTC ( Nationals) I don't see anyone using those bullets at Magazine length. Just at 600 yards where we us it in SLOW fire single feed.

I have a 87gr VLD Berger load that is a Freaking tack driver in a Grendel based case that fits the magazine. Love that little fella.

RussT

You guys are killing me.

I've only run 105-108 pills in my 6AR with pretty decent results. This is a standard 6AR (non FATRAT, non Turbo)

My 6AR that i am doing the load work on is a 22" Bartlien 5R.

Whats this magic load using the little 87 Berger pills?

 

[slm9s]

I'm selling a full custom 6mm semi-auto and am open to trades/offers.

http://www.gunbroker.com/Auction/ViewItem.aspx?Item=501787399

 

[Cakes]

The Hornady 87 BTHP shoots very tiny holes with H4895 @ 2925' in the 6AR/T40. One of my favorite pdog loads. Eric in DL

 

[SG4247]

The Hornady 87 BTHP shoots very tiny holes with H4895 @ 2925' in the 6AR/T40. One of my favorite pdog loads. Eric in DL

What twist 10?

Mine is 8 twist, not sure if that will work the 87 grainers...

Glenn

 

[Rtheurer]

That is kind of an Odd statement. Why would a 8 twist not shoot the 87's?. It will shoot all of the 105's and below just fine.

Any way I have two loads for the 87gr Berger VLD. one with R15 and the slightly better one with CFE 223 powder and a CCI 450. This is in a 6mm FAT RAT.

My Fire Form load with the 87gr Hornady BTHP shoots real well also. Varget is the powder choice there. So if you look at most folks info you will notice that almost all of them are using powders that have a burn rate around XBR8208 to as slow as Varget/R15. Your rifle will tell you what it likes. One thing I did notice is a lot of folks seem to like the 85 to 90grain projectiles ( not pills... I don't shoot medication) at magazine length as it seems to be a good balance of Higher BC to Speed while fitting the Magazine of the AR platform for which is was intended. I will stand corrected on the 105gr class bullets at Magazine length if some one is doing it and its working for them. For me at least its not ideal so I have not gone that route for my best results in Competition and the game I play with this cartridge.

I have also used the tiny 70gr SMK for practice with good success as I have a bunch and need to burn them up before they go bad... RIght?

Cheers

RussT

 

[SG4247]

Odd? Someone saying "cheers" in Memphis is odd.

Berger recommends a 10 twist for their 87 grain 6mm medication. Not sure why.

All of the powders mentioned so far are very common to the Grendel based cartridges.

You guys have not provided any useful 87 grain load information, only talk about how good it is.

I can now see exactly why the OP is so confused.

Now, off to go load some more Berger pills.

Cheers!

 

[Rtheurer]

This is a pretty mature forum so I don't want to start a pissing match here.

Typically if a manufacture recommends a 10 twist it means no slower than 1:10. Faster is OK but slower than that is not.


I am not going to give actual DATA because I don't know anything about his rifle as I am sure mine is different being a FAT RAT and not the 6mm AR or any of the other variations that are out there. Just trying not to get anyone hurt is all, I hope everyone can respect that.

As said Before I have excellent luck with CFE223 R15 and Varget with the 87's all with CCI450 primers.

Good Luck and Cheers.
Russ T

Sorry I picked up the Cheers thing while shooting with the Brits, Aussie's, Kiwi's at the Worlds Long Range Championships this last few weeks.