Whats up all my m4 carbine forum peeps…Several months ago i created a thread https://www.m4carbine.net/showthread.php?165452-338-Federal-AR-10-8-quot-SBR-Project on my 8" SBR 338 federal project and at that time it was in the finalized stages of completion…Today it is complete and i have chronographed it with some pretty interesting results… Shooting a few of the Federal Factory 180gr Accubond Nosler Ballistic tips i was clocking in around 2139fps-2171fps and shooting some of the American Eagle 185gr soft point factory ammo i was getting around 2087fps-2106fps…I still have some more testing to do with some lighter loads such as the Barnes 160gr ballistic tips…And i have some video footage that i will be releasing of my test results later this week.But for now i have attached a few photos for your viewing…Please tell me what you think…
I havent tried it out yet…but i will soon and post the results here…The weight of it is a little heavy when fully loaded with 25rounds in a pmag…but it is much lighter than my standard AR15 using a 18" barrel
Thanx glad you like it… I am using the hogue overmolded butt stock… here is a link http://www.hogueinc.com/tacrifles/ar15/buttstocks …The blast on it is ridiculous…Everytime i pulled the trigger and shot it through the chrony the muzzle blast blew apart the steel rods and sun shade…so for everytime i shot it, i had to rebuild the chrony lol… The overall length is about the same as the .308 the only difference is it is shooting a a larger bullet with more power behind it…
Sweet corn muffins! That makes the Beowulf and SOCOM seen vaguely normal. Strap a linear compensator on the front of it, and you could simultaneously kill and cook anything that you shot on the spot.
Seriously though, that is a lot more velocity than I would’ve figured for such a beast. Curious if handloads with a different powder designed for a shorter barrel wouldn’t give even better results. I bet that somebody has been doing serious load development with a TC Contender, or a Savage Striker.
I had to look up .338 Federal, I’m reading its s necked up .308 with heavier rounds going at the same speed or faster, I’m not sure about SBR form but I wonder why isn’t this round more popular? It seems like a huge winner, I’d love to see FN offer a .338 Federal barrel for the SCAR.
[QUOTE=jbjh;2172112]Sweet corn muffins! That makes the Beowulf and SOCOM seen vaguely normal. Strap a linear compensator on the front of it, and you could simultaneously kill and cook anything that you shot on the spot.
Seriously though, that is a lot more velocity than I would’ve figured for such a beast. Curious if handloads with a different powder designed for a shorter barrel wouldn’t give even better results. I bet that somebody has been doing serious load development with a TC Contender, or a Savage Striker.
I was expecting the loss of around 500fps from the factory loads that i was using and i was almost correct…I have a friend cooking up some 160gr Barnes loads…i think i might gain around 150fps more faster than my Nosler 180gr factory loads…
Thats a good question…I was surprised since its introduction in 2006, the .338 federal is a saami standardized round that can practically be found in any academy or basspro shop,and you would think it would have been more popular since it bigger and has more horsepower and weight with about the same amount of recoil compared to the .308win…Who knows maybe in the near future it might be more recognized by other firearm manufacturers as a better and more practical round to be chambered in your standard AR10 platforms.
338 Federal is a very interesting round. Readily available and reasonable price. An AR in 338 Federal is very appealing to me to use on white tail and hogs. Anyone own one and can provide feedback on rifle version and mags? I would be looking at 16 inch barrel. Thanks
Going with the 338 federal wouldnt be a bad choice…all of your 308 internal components are the same…only thing that would be different will be your barrel…Your magazines and round capacity will be the same as your .308…your BCG will be the same and dont forget the 50 round drum
A few years back while exploring this cartridge looking at the velocity curves, there seemed to be a trend that the .338 Federal could do better than .308 in shorter barrels. At the time I was looking at 16" barrels, so I cobbled together an EMC in .338 using the shorter gas system of the earlier KAC BR rail and gas system. That gun runs great, but some mags do not stack as well as others. The only non KAC part on that gun is the barrel blank itself.
Fast forward to now, there is a 14.5" KAC SR25 DSR on the horizon in 7.62. I’m working on a slightly shorter version for my own entertainment that could be an equivalent given the improved short barrel performance of the .338 Federal.
