International barrels .308 barrel for the stag 10 in real life... pics ect.
- Thread starter Big JD-From the hills
- Start date
Big JD-From the hills
CGN Ultra frequent flyer
- Location
- Saskatchewan.
Oh got to thinking the other day about a different finish, it's such a personal preference and cerakote is easy enough done. Haha what do you guys think, fde barrel as well??.. its tempting!
fluting would be nice, but it could further complicate things accuracy wise. Now if they offered a headspaced BCG to go along with these sweet barrels!! My brownells order is taking forever it seems, Wonder what would be the absolute best BCG to buy thats in canada right now? hmmm just relized I don't have any sort of muzzel device either.
Hope I get this thing running to at least shoot a few coyotes yet this winter, it sure handles sweet and the 2-10×42vx5 fire dot is just perfect in my opinion, cds with zero lock is just genius!
fluting would be nice, but it could further complicate things accuracy wise. Now if they offered a headspaced BCG to go along with these sweet barrels!! My brownells order is taking forever it seems, Wonder what would be the absolute best BCG to buy thats in canada right now? hmmm just relized I don't have any sort of muzzel device either.
Hope I get this thing running to at least shoot a few coyotes yet this winter, it sure handles sweet and the 2-10×42vx5 fire dot is just perfect in my opinion, cds with zero lock is just genius!
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Davy Crockett
CGN Ultra frequent flyer
- Location
- Fraser Valley
I second both of these. Only reason I haven't gotten one yet is I want a lightweight build without a shiny barrel.
I do want to support a local business and a good guy though so maybe I'll just have to build a second "match" upper.
I would avoid using 208gr in an AR-10 based platform. The rifle was designed to shoot 147 to around 180 grain projectiles with a very specific pressure and pressure curve. Running projectiles heavier than design puts more stress on the action and your so limited by magazine length you won't be able to take advantage of the long bullets anyway unless you single feed them.
You don't need a 200+ grain projectile to shoot long range. These are not bolt action rifles so you need to change your thinking a little to compensate for the limitations an auto loader puts on cartridge selection if you want it to be reliable and have a long service life.
I have a Modern Hunter in 6.5 Creedmoor and I don't run heavier than 130 grain projectiles even though I run 140's in my bolt action. The twist rate supports the longer/heavier projectiles but I never run the heaviest projectiles I can find in a semi no matter how far I'm planning to shoot with it.
My M-14's only get fed 175gr or lighter as well, the M-14 is a little more sensitive to pressures and projectile weights than an AR which has a more forgiving gas system but I just go with the same philosophy for all my auto loaders. I load to fit the magazine and I pick a bullet in the range that the manufacturer designed the rifle to be used with. Accuracy is still good and even a 155gr can be pushed out a long way very accurately.
As far as I'm concerned a 308 semi's best choices for long range are either a 168gr or a 175gr projectile (whichever the barrel proves to prefer) pushed by a powder around the burn rate of H4895. A 150ish grain projectile may also work very well but I get the feeling you want to go heavier for longer range shooting.
Also, unless you have money to burn I wouldn't bother with Lapua brass, semi auto's can be hard on brass and you have to full length size every time so you'll be working it more than in a bolt gun.
Find a place that will Nitride your barrel for you. Will make it last longer as well as look nice.
Looks good, if it were me I'd center your scope between the rings better. I've read that it's possible to damage your scope if the rings are too close to the turrets or the end bells. I also just think it looks better with it centered.
Not sure how it would look with a FDE barrel, as long as the cerekote wasn't too light it would probably look pretty good. I've been liking olive drab more then FDE lately though so I'm a little bias that way.
Maybe get the forend cerekote'd FDE and the barrel black?
Looks good anyway, looking forward to some more range reports from guys with these rifles and to hear how the various barrel options work in them.
What concerns do you have with fluting? I've heard arguments both ways but I've also seen some fluted barrels shoot some half MOA groups at 800 yards so I don't think it hurts it if done right.
I wouldn't have a barrel fluted though unless they can also stress relieve it when done. If not you'll lose the consistency your barrel manufacturer built into it with their stress relieving process.
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Meh
Lord hates a coward.
I got the bullets so I'm gonna try em.
The metal 10 round mags give you a bit more OAL but who doesn't love a compressed load lol.
Plus, if you can shoot a 450 bushmaster out of an AR I dont think 208 grain bullets in an AR 10 will be a problem.
Lord hates a coward.
I got the bullets so I'm gonna try em.
The metal 10 round mags give you a bit more OAL but who doesn't love a compressed load lol.
Plus, if you can shoot a 450 bushmaster out of an AR I dont think 208 grain bullets in an AR 10 will be a problem.
I don't look at it as being a coward, I look at it as taking care of my stuff and not intentionally beating the crap out of it for no good reason other than I want to try something that I know the gun wasn't designed to do.
They'll probably shoot just fine accuracy-wise if you single feed them. It's more the jump to the lands when you load them to mag length and the increased stress on the action. As I said, these are not bolt action rifles, it doesn't work the same applying everything you know about reloading for long range bolt gun to an auto loader, you have to consider the gas system's requirements to have it cycle smoothly and reliably and also remember that these rifles were never designed to be shooting 1000 yards with the longest projectile you can fit into it.
Plus, what's the point of running a 208 in your rifle? If you want to shoot it 1000 yards and your loading them short to fit the magazine with a huge jump to the lands aren't you defeating the whole purpose of trying to load the most accurate round you can in order to actually hit something out that far? You're way better off saving the 208's for a different rifle and sticking to something in the 168 to 175 grain range. You've already found out that your barrel likes 168gr so why try to go so heavy?
Well 450B isn't exactly the best round for an AR-15. There was a guy that had Herron convert his ACR to 450B and it beat the hell out of his rifle and ended up bending the op rod or something like that (don't remember the details exactly), he paid a lot of money to have it converted and he didn't keep it long after it started eating his rifle. Different cartridges can be made to work but you'll be sacrificing service life.
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Big JD-From the hills
CGN Ultra frequent flyer
- Location
- Saskatchewan.
I think your running adjustable gas blocks on your builds as well?
The only reason I have the mount that way is eye relief, and to keep the mount on the receiver. I'll give it .050" clearance once I finalize the mounting position... it's just a mock up for now.
I like lighter colors for camo because of the terrain out here. Wearing green you may as well be all black. South Sask is definitely fde territory.
I think I still have a can of krylon camo paint, that stuff is easy to remove with paint stripper or acetone so if don't like It... meh. ... the whole thing might get sprayed.
The only reason I have the mount that way is eye relief, and to keep the mount on the receiver. I'll give it .050" clearance once I finalize the mounting position... it's just a mock up for now.
I like lighter colors for camo because of the terrain out here. Wearing green you may as well be all black. South Sask is definitely fde territory.
I think I still have a can of krylon camo paint, that stuff is easy to remove with paint stripper or acetone so if don't like It... meh. ... the whole thing might get sprayed.
Yes, that was you wasn't it?
I had high hopes for that conversion but lost interest when you were having problems. My 300BLK conversion has turned out to be a fantastic cartridge for the ACR even if it lacks a lot of punch compared to the 450B.
Well then go full hydro-dip fancy camo then. I love the looks of some of the rifles I've seen done like that, I just wonder how durable the finish is. I've heard it's good but never owned one to see how it holds up.
An adjustable gas block would help and lets you tune the rifle for minimal recoil and wear but I'd still stay within the "normal" projectile weights the rifle was designed for.
There really isn't any reason to run 208's in an AR. How often is someone really going to be trying to shoot one of these at 1000 yards? Maybe once in a while just to see if it can do it but I would bet that 90% of the shooting these do will be at less than 500 yards for most people. A 155-175 grain projectile can easily and very accurately be run out to 700-800 yards if the load is actually performing well with the rifle. Doing it just because you have the projectiles is a silly reason, use them in the rifle you bought them for, and if you bought them for this I'd sell or trade them. Why would anyone even want to load them loaded deep enough to fit a magazine when you'd be sacrificing the jump to the lands that affects accuracy as well? And I don't buy an auto loader just to single feed them.
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Yes, that was you wasn't it?
I had high hopes for that conversion but lost interest when you were having problems. My 300BLK conversion has turned out to be a fantastic cartridge for the ACR even if it lacks a lot of punch compared to the 450B.
It probably would have worked good if he actually test fired it and adjusted the gas system. It left a bad taste in my mouth after spending $1100+ on a barrel.
- Location
- Red Deer, Alberta
Bushmaster now makes a drop in 18.5" 450 Bushmaster conversion barrel kit for the ACR. Yeah they finally released a caliber conversion kit.
Big JD-From the hills
CGN Ultra frequent flyer
- Location
- Saskatchewan.
With the 300blackout how does that work with sub sonic vs super sonic loads? Would it be possible to run sub sonic loads through the .308 platform?
I put 50rds though a suppressed 300 blackout this spring. Anything longer than a 5 round burst it really blasted my eyes with gas however.
5.56 works real slick though
https://youtu.be/tU_nrNTmnzE
I put 50rds though a suppressed 300 blackout this spring. Anything longer than a 5 round burst it really blasted my eyes with gas however.
5.56 works real slick though
https://youtu.be/tU_nrNTmnzE
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My 300BLK conversion cycles my handloaded supersonic and subsonic loads very well. It is also very accurate and shoots about .9moa at 100 yards with my 155gr loads. This is my 3rd 300BLK semi and also have a Rem 700 16 inch in 300BLK, been loading and shooting the cartridge for a few years now. Been too distracted lately though, been trying to get back into long range and have been neglecting my fun
short range stuff.
As for 308 I doubt you could make a subsonic load that would cycle the action. I haven't done any 308 subsonic testing so am only guessing. There may be a powder with a burn rate that could be made to work. I have load data for subsonic 308 win but not for an auto loader.
Lol, I was lucky enough to get to shoot 300BLK supressed full auto with regular capacity magazines. I don't remember much beside my cheeks hurting from smiling.
I'm not saying that you have to stay under 180gr for any cartridge/caliber the rifle is chambered in. Just that when using an auto loader that you don't just go to the heaviest projectile you can get in that cartridge thinking it's better for long range like if you were shooting a bolt action. If you were going to run 225gr because you wanted to shoot it 1000 yards I would say you would be better off with the 210gr.
Think of it the same as if you were loading for a 308 M14, you stay in the 150-180gr regardles of the barrel twist because you have to work with the gas system requirements. An AR-10 has a less finicky and tougher gas system but the philosophy is the same and for it to cycle smoothly and reliably you need to think of more than just the heaviest projectile the twist rate will stabilize.
Maybe I'm wrong to think this way but I think that if you're limited by magazine length anyway it's better to pick a projectile that lets you run it out close to the lands and still fit the magazine.
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Big JD-From the hills
CGN Ultra frequent flyer
- Location
- Saskatchewan.
Well finally got the new barrel installed, and took it out last weekend. Ran nearly 200 rds through it, it was cold and a bit windy but it didn't seem to mind. I fired 2- 30 shot strings in a row, the first one was the Austrian surplus and second lake city. So it was 6-5shot groups each. I wanted to check for point of impact change mostly. I was shooting kneeling over my tailgate with only the bipod for support, definitely no 'precision shooting' by any means. Oh also got some super slow motion shots of the action with my phone. Just need a muzzle brake I suppose. I would say that there was no detectable shift In impact.
https://youtu.be/FgUtzXZF9pU
https://youtu.be/FgUtzXZF9pU
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