That's what I'm waiting on myselfWhen one comes out in 6.5cm, I’m in. If it eats brass then I guess it does.
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
That's what I'm waiting on myselfWhen one comes out in 6.5cm, I’m in. If it eats brass then I guess it does.
No I can understand that. Shame Ruger didn’t think about that a bit more. I guess they were happy to have such a soft shooting 308 they didn’t care about brass
Changing the buffer is what jacked up your es and sd. You'd have to start load development all over again with the 168.I tried 3 ten shot groups today with 42.4,42.6(used last time) and 42.8 of Varget. Plus I switched to 6.7oz buffer.
The SD and ES tripled for 42.6 I know ten shots is going to show a more accurate range but it was surprising. Groups opened up too. Maybe due to the heavier recoil impulse with the heavier buffer.
I think I’m going to concede that this barrel doesn’t like 168 gn MatchKings. Time to move on maybe. My plan was to see what the rifle could do with what should have been a tack driver bullet before developing a critter round. 42.6gn with low SD/ES numbers was looking promising with an acceptable 100 yard group, but not so much after today.
No big deal, kind of disappointing but it’s all fun, right! I’ll do some research on a good fox/coyote bullet and start over.
Even with the heavier buffer it’s still tearing up case heads. Am I pushing it too hard?
I was shooting my ‘farm critter’ 300AAC yesterday working up some 110 v-max loads, makes me realise how nice the trigger is on my SFAR
Now I want to take my Springfield SAR-8 out. I have some old British Surplus so I don't have to worry about damaging Berdan primed brass. But then I have to mount a scope in the claw mount. I really need to grab one of the picc rails that attach to the receiver mounts.I'm guessing the bulk of the target audience for that AR at that price point are folks mostly shooting factory ammo and don't care about reloading.
But hey it could be worse.
Try shooting a HK 91 or clone.
The brass gets practically smashed, but on the plus side if you don't hit your target with the bullet, the case flying forward might take them out instead.
Reading your post makes me want to turn the gas block to zero and use it as a ‘straight pull bolt action’Changing the buffer is what jacked up your es and sd. You'd have to start load development all over again with the 168.
I went through all that with a 16" pws 308. I believe its a mid gas setup. Pws has since realized the error on their ways and the new rifles run a longer gas system.
I sat down with 168 fgmm and tried three different buffers, three springs and an a5 length extension. Groups shifted in poi and overall size with every change in the buffer setup and es and SD varied wildly. I racked my brain over it for quite a while to the point I was really just losing interest in the platform.
In the end I ended up with a home made heavy buffer, Tubbs flatwire and the a5 extension.
Seeing your struggles are reinforcing my idea of buying the 20" sfar and cutting it down to 16"
Reading your post makes me want to turn the gas block to zero and use it as a ‘straight pull bolt action’
What weight buffer did you end up with? I’ve tried the heaviest I can build with the Odin (7.6oz) and it’s horrible to shoot. I’ve not messed with springs yet, wouldn’t know where to start.
Actually, re-reading your post makes me wonder if I should stick to the 6.3oz buffer and try another ten shot with Varget 42.6 which gave good enough numbers and group before. The case head damage wasn’t significantly reduced by the 6.7oz one.Changing the buffer is what jacked up your es and sd. You'd have to start load development all over again with the 168.
I went through all that with a 16" pws 308. I believe its a mid gas setup. Pws has since realized the error on their ways and the new rifles run a longer gas system.
I sat down with 168 fgmm and tried three different buffers, three springs and an a5 length extension. Groups shifted in poi and overall size with every change in the buffer setup and es and SD varied wildly. I racked my brain over it for quite a while to the point I was really just losing interest in the platform.
In the end I ended up with a home made heavy buffer, Tubbs flatwire and the a5 extension.
Seeing your struggles are reinforcing my idea of buying the 20" sfar and cutting it down to 16"
I’m surprised 11oz doesn’t kick real bad! That must be helped by the Tubbs flat wire. I’ll have to look into that. Thanks.View attachment 8034515
I left all the meat on this sucker I could. The back end measures the same length as an ar10 carbine length buffer but overall it's the same as a regular buffer. Ended up just over 11 ounces!
Prior to this I used the heavybuffers.com car-10xh which was a 6.5 ounce buffer and their heavy spring. Sucker kicked like a mule but shot decent. Honestly I didn't think a 308 was capable of that kind of recoil. Still wrecked brass though and it put a lot of gas in your face. Which isn't supposed to happen with a piston gun.
I switched to an a5 reciever extension with a Tubbs flatwire and my buffer and it finally calmed down to a 2-3 O'clock ejection pattern depending on what I'm shooting. I believe there's three tungsten weights in it and the whole front end of it is solid. Recoil isn't bad at all now believe it or not.
Keep us posted. I'm curious as to how it'll work myself. One thing that surprised me when I handled the 16" sfar at my local gettin spot was how stout the spring was. I don't think the wolf extra power spring I had in my pws was that stiff.@XP1K i just ordered a Tubb’s spring so that’ll be interesting to see how it works. Thanks for the info.
Yeah the stock spring is brutal. Whatever COL you load your rounds to , it’ll stretch .020 at least with the stock buffer.Keep us posted. I'm curious as to how it'll work myself. One thing that surprised me when I handled the 16" sfar at my local gettin spot was how stout the spring was. I don't think the wolf extra power spring I had in my pws was that stiff.
The flatwire definitely has a different feel to it.
I did d some brass prep last night, over 100 pieces. Just about every one had to be run over a file just so I could get it in the shell holder thanks to the ejector and extractor damage. I think much lower loads will need to be tested otherwise we’re going to be buying new brass far too often.My load runs with FC brass were pretty bad in terms of ejector/extractor marks, and lost some primers too, all well below book max loads. Win brass and lower loads held up better, but you can see even factory Winchester XP is getting a bit mangled up, with brass carved up by the ejector holes. I don't claim that the Win XP group is repeatable, but the rifle did seem to like that ammo.
(btw, the primers are missing below because I popped them out to check for pocket growth, only the highest 165gr load showed a little)
View attachment 8037200View attachment 8037201View attachment 8037202
Once my LC LR brass comes in, I guess I probably need to drop a half grain or so and work up again. I had a few of the 150gr loads jam up during feeding, I think they didn't have quite enough power to cycle with the H2 buffer in, so I may reshoot those with an H or even carbine buffer in to see what happens.
It’s even blown primers on factory 150gn so go figure
I did see a YouTube video where someone had put a Midwest hand guard on. Not sure about barrel, I believe the bolt lugs different to regular AR milspec stuff so that would have to be dealt with.Really want one of these, I hope it stays around. One with a light can and a MK5 would be a fairly medium weight little package. Can the barrel and handguard be changed?
Yeah, popped out. One jammed between gas key and bolt pivot pin and locked the BCG up ( see earlier post with photo)Blown as in popped all the way out and rattling around in the magazine etc? I would send it back to Ruger. Something is wrong.
Ejector swipe and little burrs here and there are pretty normal but popped primers aren't.
Yeah, popped out. One jammed between gas key and bolt pivot pin and locked the BCG up ( see earlier post with photo)
I think the primer issue comes down to the bolt unlocking way too early. Once run in, and running on a lower gas setting it’s better ( with heavier buffer) but still shows ‘pressure signs’ way earlier than you’d expect.
I’ve been too busy on the farm to shoot lately but have several new loads to try and a Tubbs flat wire buffer spring. Hopefully I’ll get back on it this week.
I've seen the video you're talking about. That was a standard ar15 handguard.I did see a YouTube video where someone had put a Midwest hand guard on. Not sure about barrel, I believe the bolt lugs different to regular AR milspec stuff so that would have to be dealt with.
I think there will be a ‘gen 2’ out before long.
I’ve been too busy on the farm to shoot lately but have several new loads to try and a Tubbs flat wire buffer spring. Hopefully I’ll get back on it this week.
Although they have almost the same closed bolt pressure, the Tubbs is way easier to rack the bolt and has a very constant pressure throughout. Looking forward to seeing how it shoots!I was just about to ask you how it went with the flatwire spring.
That's what I noticed with mine. Has a more consistent feel to it when cycling the action. I've got one in my large frame and one in my ar15. I was less wowed by the ar15 and for the application it's in I may put the stock spring back in.Although they have almost the same closed bolt pressure, the Tubbs is way easier to rack the bolt and has a very constant pressure throughout. Looking forward to seeing how it shoots!
Mine didn’t like 150s much, weird how it varies from rifle to rifle! Was this suppressed? How was your brass looking with H2 and H?Worked on loads a bit more for the SFAR yesterday. It was raining so I tried to label the targets with load info before hanging them up, and then wound up losing track of which row was which, so they are kind of a mess.
View attachment 8055196
The rifle does seem to favor lighter bullets, including the bunch of 150gr SP I had left over from a Hornady promo. I'll probably try something along the lines of 155gr ELDs at some point, now I think I'll swap the 12x SS for my 3x prism and run with these loads for a while since I have the bullets laying around.
The 150gr loads were pretty light and choked occasionally with the H2 in, so I went back to an H. I did see about 120fps higher velocities with LC LR brass than Winchester with the 150gr loads, which was more than I was expecting.
Yeah, I had my Nomad TI mounted and the GB on setting 1 for all the shooting yesterday. I don't think I'm seeing much difference between H and H2 brass, I'll check again with the 165gr since they are stouter, but I think it's just going to be kind of hard on brass either way, curse of the AR-10.Mine didn’t like 150s much, weird how it varies from rifle to rifle! Was this suppressed? How was your brass looking with H2 and H?
The 150s ran around 2530. This rifle shows pressure early so I’m keeping loads a bit slow.I'm surprised it cycles with those lighter loads.
IMR4895 at 42 grains in military brass with a hornady 150 FMJ loaded to the cannelure should be milspec type ammo in pressure and velocity (about 2.720?). If you use a 168gr 2.800 then it should be close to generic off the shelf match loads.
Small base sizing with lots of shoulder bump and trim to 2.0.
I have a few pet loads like win brass, 175smk, 43.5 varget, 2.80" that I'm suspicious if the rifle doesn't shoot well with them.
The 150s ran around 2530. This rifle shows pressure early so I’m keeping loads a bit slow.
I’ve given up on 168smk as I just couldn’t nail down anything satisfactory.
The 110s ran really nice, very little recoil. The 175 and especially the 220 kick but I still want to play around with buffer weights if I go that route. I don’t want to be changing buffers to go between 110 varmint loads and 220. I think the 110 at nearly 3000 fps should be fine for coyote and fox so maybe the 220s are redundant anyway.
So how's the Tubbs spring working out, not quite like you had hoped ?Well, think I’ve found a critter load ( v-max110) , looks good enough for 100-150 yard work and maybe a cheap mid range plinking load (Hornady 150fmj/bt)
I’d like to say the flier on the first group of Sierra 175tmk was me but I can’t I’ll try that load again.
Funny how the groups with the best numbers rarely have a group size to match!
I had 5 loads of 5 in 200eld-x but once again the gun jammed up, big time. Brass punch and hammer like before. I did some measuring and posted up in the reloading forum. Someone very kindly pointed out my problem ( most likely, yet to verify) For some stupid reason ( old age? Dumb?) I hadn’t checked my base to shoulder measurement I know better than that but there it is. My loaded cases had the same measurement as a fired case ! They cycled until the chamber got dirty ( quickly with a can on) I’ve resized 20 to test. If that fixes that ‘problem’ I can resize the other 150 primed cases
I got frustrated with it yesterday and thought sod it, it can just be an expensive tractor gun but then remembered the vent holes in the bolt and especially around the barrel extension. Hay dust, dirt etc would quickly fill any spaces up! Still hoping it turns out reliable.
There's not a huge difference with the Tubbs but ... there is something! Not sure what it is but I prefer it. I'm actually going to get one for 2 of my 300AACs so yes, there is 'something' about them.So how's the Tubbs spring working out, not quite like you had hoped ?
That load with the 110's looks pretty good. The 110's out of the blackout are pretty tough on pigs and deer, can't imagine more velocity would hurt anything. 2900 out of a 16" gun ain't too shabby.
My mistake, thought you had the 16.There's not a huge difference with the Tubbs but ... there is something! Not sure what it is but I prefer it. I'm actually going to get one for 2 of my 300AACs so yes, there is 'something' about them.
I didn't know 110s would work on Deer and Pig! Going to work well on Fox and Coyote then for sure. I have the 20" barrel which helps that velocity. It's not a max charge by any means but I don't want to push it and get more popped primers.
I'm giving up on trying to get good group with good numbers as the two don't often go together, but as all critter shooting will be within 150 yards (past that and I'll probably just shoot fence wires anyway!), the numbers don't mean much if the group is good and dependable.
I can use the 150s for 5-600 yard steel at the range with their numbers. I'll just use my 6.5cm bolt gun for 1000 steel unless I stumble upon a good enough load one day.
I'm kind of hoping Ruger test fired a bolt more cycles than I'll ever shoot this rifle. Functional failings are one thing, but structural ones are another matter. Mind you ..... the bolt on my 3rd gen RPR failed after 30-40 rounds. Time will tell !My concern is with the thin bolt. Will let others do the testing to see how durable it is.
Thin headed 7.62x38 AR15 bolts don't hold up well.
Yep, that's why I won't be rushing out to get one.I'm kind of hoping Ruger test fired a bolt more cycles than I'll ever shoot this rifle. Functional failings are one thing, but structural ones are another matter. Mind you ..... the bolt on my 3rd gen RPR failed after 30-40 rounds. Time will tell !
You like fireballs?Has anyone tried cutting the barrel to the 12.5" to 13" range yet?
I don't know why you would tbh, unless you're very specifically loading your own for that barrel length.Has anyone tried cutting the barrel to the 12.5" to 13" range yet?
Keep us posted.That's a viable option but I hate Sig products and avoid them at all costs
I think for a night hunting setup and a 100% suppressed set up for a reloader it will be a nice setup
will change the handguard to a 12.5" zev wedgelock tune the buffer and gas system and should be able to work up a good load for it
then if you really dislike the MCX that much, you can make an equivalent using the Law Tactical ARIC (with the correct spring weights for 300blk) and a standard AR parts set otherwise, and get a PMM sig-style stock (the "kate moss" I believe its called) or another stock of your choosingThat's a viable option but I hate Sig products and avoid them at all costs
I think for a night hunting setup and a 100% suppressed set up for a reloader it will be a nice setup
will change the handguard to a 12.5" zev wedgelock tune the buffer and gas system and should be able to work up a good load for it
That's a viable option but I hate Sig products and avoid them at all costs
I think for a night hunting setup and a 100% suppressed set up for a reloader it will be a nice setup
will change the handguard to a 12.5" zev wedgelock tune the buffer and gas system and should be able to work up a good load for it
This thread should answer some of your questions. https://mdws.forumchitchat.com/post/ruger-sfar-308-12445120?&trail=25Guys, I have a crazy question…
Origin story - I had hoped the LWRC Six8 would allow me to build an AR in .223 Wylde with an insanely long max COAL, but the small gain of only 40 thou just wasn’t enough to justify the work I’d have to do on it.
Ready for crazy? Here I am.
Can a standard 5.56 AR upper be installed on an SFAR lower? If so, I’d like to develop a magazine for it. I think I could gut an SR25 PMAG, modifying it as necessary, and bond in a 5.56 mag that’s been windowed at the front for super long loads.
I may have to use an AR9 bolt catch or something like that, but I can figure that out down the road.
The first thing to know would be whether a standard upper can be stuck on there, and I’m hoping one of you guys will help feed my illness.
Cheers,
Lawndart
Although upper and lower pin holes 'would' align, they can't because the bolt release is in the way. Even if you removed half the width of the bolt release, I don't think it'll work on the AR bolt. FCG is in the wrong place plus the SFAR lower is slightly wider than an AR so the upper doesn't sit on the lower properly. I can't close the upper/lower due to the bolt release being in the way but it looks like you'd have a small gap at the rear too.Guys, I have a crazy question…
Origin story - I had hoped the LWRC Six8 would allow me to build an AR in .223 Wylde with an insanely long max COAL, but the small gain of only 40 thou just wasn’t enough to justify the work I’d have to do on it.
Ready for crazy? Here I am.
Can a standard 5.56 AR upper be installed on an SFAR lower? If so, I’d like to develop a magazine for it. I think I could gut an SR25 PMAG, modifying it as necessary, and bond in a 5.56 mag that’s been windowed at the front for super long loads.
I may have to use an AR9 bolt catch or something like that, but I can figure that out down the road.
The first thing to know would be whether a standard upper can be stuck on there, and I’m hoping one of you guys will help feed my illness.
Cheers,
Lawndart
What COAL are you hoping for? I've gotten to 2.42 on a standard small frame lower.Origin story - I had hoped the LWRC Six8 would allow me to build an AR in .223 Wylde with an insanely long max COAL, but the small gain of only 40 thou just wasn’t enough to justify the work I’d have to do on it.
Mag fed? That seems to be the hang up…What COAL are you hoping for? I've gotten to 2.42 on a standard small frame lower.
Maybe that's with a DPMS LRP-style magazine that uses the rear rib as a single stack?What mag? Did you cut a channel in the front?