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Thread: 6mm 223 AR upper White Oak barrel

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    Gunco Veteran Bolt2bounce's Avatar
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    Default 6mm 223 AR upper White Oak barrel

    I built a 6mm223 (6X45) Upper using a White Oak Precision barrel a few years ago.. I had test fired it once before and zeroed the Springfield Armory scope.. but I got to really test it out this last weekend.. Varmint shooting in Oregon.. I have to say it really preformed well. I shot over 300 + rounds and I had no failures other than a magazine who's base plate came off under spring tension.. I was shooting a few different loads 95 Gr Partition 87 Gr A max 70 Gr TNT mostly used H322 powder but had a few loads using IMR 4895 also.. My specs were a white Oak Stainless Steel 20" Match heavy barrel.. I used JP enterprise stainless steel Gas block and a round Aluminum Free float hand guard with Harris Bipod. I used a Flat top Upper receiver and I mounted a Springfield Armory Range finding scope.. on it which used a GGG scope riser to get proper eye elevation.. Rings were weaver Lower was a LRB unit.. with the stock trigger installed.. during the shoot I as using an adjustable CAR type but stock.. B2B
    Last edited by Bolt2bounce; 05-13-2012 at 11:32 PM.

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    No Hope For Me 1biggun's Avatar
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    ID LIKE TO KNOW HOW THAT ROUND PERFORMS WITH THE LIGHTER BULLETS LIKE THE 58 GRAIN VMAX. I WAS CONSIDERING THE ROUND FOR A AK CONVERSION. i LIKED THAT IT MIGHT BE POSSABLE DEER ROUND IN THE 100 GRAIN BULLET ( WEAK DEER ROUND) AND STILL BE A FUN VARMINT GUN WITH THE LIGHT STUFF.

    HERE IS A PRETTY INTERESTING BIT OF LOAD DATA I GOT OFF THE NET SO WARNING DONT TRUST IT BUT IT SEEMS LIKE THE GUY PUT A LOT OF WORK INTO IT.

    http://buckammo.com/Images/6x45_loaddata_1_1.pdf

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    Gunco Veteran Bolt2bounce's Avatar
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    I loaded some 60 Gr HOLLOW POINTS but they did not feed in my rifle so I had to shoot them single rounds.. not much fun in a semi auto.. I gave that up after my first work up loading.. Also I was using Mil surplus mixed brass..not the best idea for accuracy work.. yeah that is a good link and a lot of data and powder info... I was looking for a bit heavier bullet than the 223 offered, 80 Gr is about max with a 223 and ya need a special tight twist and such.. if I was going to go with a light bullet I don't see any advantage with the 6mm 223... SO I like the idea of the 95 gr bullet. in the 6mm223.. for a little longer range.. Did not like the Springfield Armory scope it was hard to see and the cross hairs are way too busy for varmint shooting.. but it was what was mounted at the time.. B2B

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    Gunco Veteran patjsimpson's Avatar
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    Sweet, that and a 300 blackout are on my list of wants these days. near the top because it is a looooooong list ;-)

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    gunco irregular moleman's Avatar
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    I've had a 6x45 for about 20 years. I've mostly only shot 60gr to 75 grain bullets. Accuracy is usually excellent as long as you do your part in reloading and shooting. Haven't shot a deer with it even though I think it would do fine if you picked your shot and kept the distance short. Both of the barrels I've owned shot hollowpoints by hornady and sierra without any issues. Every time I think about taking the 6x45 hunting I talk myself out of it because I can't come up with a situation where it would outshine my 30-06, .444, 30-30 or heck even a 762x39. After making my 357AR it is even further down the list as I plan on taking that this fall.

    What were the hollowpoints catching on that was causing them to jam?

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    Gunco Veteran Bolt2bounce's Avatar
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    They were very large 60 GR hollow points, not like a match king..and were catching on the feed ramp.. I'd have No problem hunting deer with a 6MM223 using 90 Gr partitions.. Inside 200 yards it would be deadly.. B2B

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    Scheiße. Mr_Posthumous's Avatar
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    I love varmint shooting. What part of oregon? I hail from the rogue valley

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    Gunco Veteran Bolt2bounce's Avatar
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    I love shooting varmints also.. self erecting moving targets.. and better that poison.. Klamath Falls area.. a friends, friends ranch.. nice country.. but really no jobs..and lots of snow some years... that maybe be good or bad.. B2B

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    Scheiße. Mr_Posthumous's Avatar
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    I lived in KFalls 91-97. Then moved over the hill. Pretty country, but yea, no jobs. Used to go snowmobiling up in fort klamath area a lot. Morel hunting in the spring. Good times.

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    Gunco Regular allesennogwat's Avatar
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    I had a 6x45mm barrel on an AR15 20 years ago. I noticed the newer ones now say that they have the M4 feed ramps. All of the load data I had was for lightweight bullets. These days there are bonded bullets which should work better on deer. I did load a lot of FMJ bullets just for plinking. Back then 223 was really cheap though. I think 70 grain bullets were the most common for 6x45mm when I had mine.

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