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^This^ I've got both a semi auto 6.5 PRC and 300 WSM. The PRC with 147gr ELDMs is very very smooth to shoot, I could easily shoot it all day without it beating me up. The 300 WSM with 190gr Bergers is a bit harder on the shoulder, but it's an elk killer. Since I do a lot of hunting, I'm...

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It's at around 9.5 pounds.

Most of the parts were things I had laying around. The barrels I got from X-Caliber, I had a Magpul PRS lite stock and Magpul standard grip, Geissele Dual Stage trigger, Spuerlative Arms adjustable gas block. I have two bolts, one from KAK Industries and one that is modified (not sure what brand).

I'll be using a simple 3 ribbed brake. I'm still debating on the scope, but I'm leaning toward a Leupold Mark 5 or US Optics FDN17. I'll post more once I get out shooting more, I can't wait to get some loads developed!

Never heard of Rifle Speed gas blocks, I'll give them a look. I'll be trying a heavier buffer as well. The only reason I ask about heavy optics is that I used to work for a company that sold big bore AR's. One of the customers could not get their gun to cycle and sent it back in to have us...

I finally found that a .077 gas port is the size that works best for the setup that I currently have. Dwell time still seems a bit quick since some of the rims are only very slightly raised, but not all of them. I currently have a 5oz buffer, I'm thinking a slightly heavier buffer will give me...

I've thought about buying a KAK upper and seeing how well it works with my receiver. Yes, 200gr is heavy for the 300 WSM IMO.

300 WSM, 22" barrel and 200gr Hornady ELDX. I realize they are hot loads, but I'd like to get reliable cycling with as much speed as possible. After that, I'll work on accuracy.

Velocity is 2820 fps

I tried the gun out this afternoon, here's what I found: With 2 rounds in the magazine, the bolt seems to short stroke. Sometimes it will eject the spent case at the 4-5 o'clock position, sometimes it will barely unlock from battery. It never picks up the next round, and I don't have a bolt...

New barrel with a .0625" gas port came in yesterday. Work's been busy, but I'm looking forward to getting it installed and trying it out soon.

Thanks for the info, I may have to experiment with this in the future. PM sent

Haven't had a lot of time to do some extensive testing, but here's a video I got of it last week. This is the 6.5 PRC upper, it works a bit better, but is still over gassed. I tried both the Griffin Armament +15% extra power spring, and standard AR 308 carbine spring, both seem to operate the...

Thanks for the replies. Here's a little bit more info on the current setup: The rifle has a milspec carbine buffer tube with a 22" barrel. The reloads are 200gr Hornady ELD-X with 60.5gr of H4350. I know it's at the upper end of things, but I want to make sure the system will work with...

Update: I've hit a snag after testing a new 300 WSM barrel this weekend. I believe the gun is still over gassed and the gas port in the barrel is too large, but I'd like some input on this theory. I have a SLR adjustable gas block installed with a +2 rifle length gas tube, I'll adjust it...

I'm going to try and get a short video this weekend. Yes...you might...

It's a CNC machined lower that I designed. I have a small machine shop along with a type 7 FFL, so why not. Yeah, the AICS mags need no modification at all, they work great!

I thought some of you would find the project I've been working on interesting. This is my AR10 style rifle chambered in 6.5 PRC and 300 WSM: The lower receiver is my design, it accepts AICS short action mags. The mags allow for slightly longer OAL for the 300 WSM and factory length 6.5 PRC...

This is my own design. I've got a small CNC shop and type 7 FFL and spent the last several months modeling up a receiver (mainly because I just really wanted one). I've opened up the bolt face to .54 and modified the extractor in order to except the larger rims. I also wanted a more reliable...