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See the contestI do pretty okay with my gearNot quite!
The LRAD mounts to tripod and CROWS (MG) mounts per their website.
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Also, per Bearcats website, it is indeed an MG mount.
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According to BearCat, you may need a MK19 for "defensive" police operations. Right....
Before you start making snarky remarks, know your gear. But, I would bet you still won't know how to use half your shit but will feel really good going out and pointing it at people because it makes your pee pee hard.
Back to AIs, hopefully in the hands of responsible citizens.
I like your hole....
I do have a solution for that....But....it has a Bushnell sitting on top of it...
So I run the numbers for more projectiles and other barrel twists, I do know that bullet weight isn't really the issue it's length/bearing surface/ogive that all goes into, probably safe to say that high BC bullets need a faster twist.Again, it isn't just about the bullet weight, but the bullet length as well that matters.
Plenty of folks ran the M40, M40A1, M40A3 and M40A5 out past 1000 yards just fine, which has a 1:12 twist barrel, and ran M118LR rounds, essentially Federal GMM SMK 175gr. I did reach out to a sniper instructor peer who has combat experience with the M40 rifles, who confirmed the distance and capability for me.
We also have @FUNCTIONAL with very direct experience running the M40. Sorry to call you out but it's important. Hell I want to share more of that shot data just as a solid reference...
There's no reason why the 1:12 Lothar Walther barrels aren't extremely capable. But, the right round needs to be chosen for it.
And so this circles right back to why I made my original post sharing the shot group: the Sierra 168gr TMK round with it's improved 9° boat tail seems to work best in this barrel, which I've so far tested in 20", and I have no doubt will perform equally well in my 24". My next range day I hope to get 300 round shot groups, and later, 700 round shot groups depending on wind.
I'll share all the images and data I have on this round. For us Yankees, the Federal GMM SMK 168gr & 175gr, and the Federal LE T308T 168gr, seem to be the most effective and cost conscious round to use in these barrels.
I don't have experience with Lapua or Berger rounds in these calibers, so I leave it to others to comment on what else shoots well. I invite it as this data is important for folks like us to have.
And yes, I read every single post in this forum regarding the Arctic Warfare and AT308 looking for ballistic data of factory rounds, and found excruciatingly little.
I hope the attached data helps for context. And I have much more data that shows how the length of Hornady rounds do not stabilize. I also tried the stability factor with a Berger 185gr round without success, but I'd entertain actually shooting it to see how it performs.
Well shit!So I run the numbers for more projectiles and other barrel twists, I do know that bullet weight isn't really the issue it's length/bearing surface/ogive that all goes into, probably safe to say that high BC bullets need a faster twist.
The outcome is the same as before, other than SMKs (older bullet design, shorter, low BC*) a 1:12 is not a brilliant choice, especially if it's a short barrel. 1:11 is definitely better but still suffers with some of the very heavy/high BC bullets, and a 1:10 is basically good for anything.
It's worth point out that only the Berger Hybrids are actually unstable in the 1:12, everything else on orange is just marginally stable.
The biggest take away from this whole thing is how amazing the newer SMK designs are 169gr/200gr (also the 131gr .25cal, 130gr and 150gr 6.5mm) these things have massively improved BCs over the old SMK design, often have a higher BC than the same weight TMK yet are shorter and likely more forgiving on seating depth.
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I know I could've stream lined this table even more, but it is was it is.
Orange is marginal stability 1.0-1.5.
Red is unstable <1.0
Greyed out means fully stable (because the twist above (slower) was 100% stable at all speeds no point running the numbers at a tighter twist).
I think it goes without saying if it shoots well who cares what the computer says.Well shit!
Imagine how good mine would shoot if I used stable bullets!!!
I should add if I haven’t already that this rifle shooting 178 ELDX is a crop damage hunting rifle. So shooting deer inside 600 for majority of its life. I haven’t shot it a bunch further to see how it truly stacks up at distance. I will be grouping some distances near 500 in coming month when I can access my range area. I’ll share more info then. Just testing a couple charge weights of IMR 4064 expanding of previous testing I didI think it goes without saying if it shoots well who cares what the computer says.
I'm no expert but I believe you are probably just giving up some BC, the bullets are stable enough for accuracy.
I hope my LW 1:12 shoots as well as yours, I plan to run 168gr ELD-Ms rather than the 178s, more stable, a bit faster and similar ballistics (if I get a bit more speed). I'll be shooting 168gr SMKs to start with (factory ammo). I have a few rounds of Hornady match 168gr ELD-M to test out also.
Anything orange (1.5 and lower) I don't consider stable enough to shoot.So I run the numbers for more projectiles and other barrel twists, I do know that bullet weight isn't really the issue it's length/bearing surface/ogive that all goes into, probably safe to say that high BC bullets need a faster twist.
The outcome is the same as before, other than SMKs (older bullet design, shorter, low BC*) a 1:12 is not a brilliant choice, especially if it's a short barrel. 1:11 is definitely better but still suffers with some of the very heavy/high BC bullets, and a 1:10 is basically good for anything.
It's worth point out that only the Berger Hybrids are actually unstable in the 1:12, everything else on orange is just marginally stable.
The biggest take away from this whole thing is how amazing the newer SMK designs are 169gr/200gr (also the 131gr .25cal, 130gr and 150gr 6.5mm) these things have massively improved BCs over the old SMK design, often have a higher BC than the same weight TMK yet are shorter and likely more forgiving on seating depth.
View attachment 8649111
I know I could've stream lined this table even more, but it is was it is.
Orange is marginal stability 1.0-1.5.
Red is unstable <1.0
Greyed out means fully stable (because the twist above (slower) was 100% stable at all speeds no point running the numbers at a tighter twist).
No one is disputing that.Man, this conversation is like 15-20 years old. 12 twist will stabilize 190gr and 200gr SMKs.
March 1.5-15?I do have a solution for that....
However it's a 3-12 LRTS, the only other decent lower magnification FFP scope on the market is the Mark 4hd 2.5-10, and I'm not quite ready to stoop to that level.
Yeah that is an option, I was keen on a DFP model but the mixed reviews put me off.March 1.5-15?
It's interesting that Frank still shoots 308win. One would think barrel wizards shoot exotic calibers all the time. But I'm actually happy to see this, it's validating.Last word on barrel twist (at least until I shoot the damn thing) was this comment from Frank Green in another thread, says it all really, given the choice 1:12 twist is leaving a lot on the table.
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This rifle is beautifulBe well soon! Might be fun to shoot small calibers for a while, practice is practice, doesnt matter which caliber.
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Do you have a picture? I have a few AI triggers from the 80s and 90s with adjustable trigger shoes that could probably be mistaken for aftermarket, but are internally the same as all "regular" AI triggers. Or is yours an older variant of the comp trigger that were designed/sold under the CG, Jackson, or Xtreme brand?Does anybody have a diagram or a set of instructions on how to adjust the original first, I'll call it aftermarket two stage AI trigger that Tom made for AI? I don't know if that's the same as the AI comp trigger they're putting out now. I've got one in a AIAT I'd like to make a little heavier.
I believe it was the CG Jackson/extreme trigger that probably came out 2019 maybe 2020 that has evolved into the AI competition. it's an AI branded replacement two-stage.Do you have a picture? I have a few AI triggers from the 80s and 90s with adjustable trigger shoes that could probably be mistaken for aftermarket, but are internally the same as all "regular" AI triggers. Or is yours an older variant of the comp trigger that were designed/sold under the CG, Jackson, or Xtreme brand?
Internally I'm pretty sure they're mostly the same. CG triggers have always been the same internally and I believe it was the guys at the (now-closed) Shooting Shed in the UK that developed the CG design by Robert Chombart to fit AIs. I had a look at all the diagrams I could find online a while ago and it looked like there was no difference in the general design between the two, so you should be fine to use the Competition Trigger adjustment guide, or a generic CG adjustment guide below.I believe it was the CG Jackson/extreme trigger that probably came out 2019 maybe 2020 that has evolved into the AI competition. it's an AI branded replacement two-stage.
@diggler1833 nice rifle and really nice shooting. You may have posted it before but what color is that?
Nice shooting!So to come off like a self-sucking dick, I finally took my new-ish factory 6CM barrel and 108gr ELD-M out to true velocity (I'm an old Fudd with an old chronograph).
650 yards. I'll admit now that the first group was a fluke and probably not repeatable. The second group wasn't a slouch either though.
One mag was all I got in after haying, and then it was time for chores. Just came in from setting 2-7/8" drill pipe fence posts in concrete (I do concrete work and bench presses as side jobs).
26" Bartlein, 1:7.25". Velocity looks like it is going to be ~3,060 since I was still almost 2 inches high at 3.5.
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Dude, I shot 6cm most 2024 and love the round. Good work. Sometimes hard to spot impacts here in South TX summer but i like that round a lot.So to come off like a self-sucking dick, I finally took my new-ish factory 6CM barrel and 108gr ELD-M out to true velocity (I'm an old Fudd with an old chronograph).
650 yards. I'll admit now that the first group was a fluke and probably not repeatable. The second group wasn't a slouch either though.
One mag was all I got in after haying, and then it was time for chores. Just came in from setting 2-7/8" drill pipe fence posts in concrete (I do concrete work and bench presses as side jobs).
26" Bartlein, 1:7.25". Velocity looks like it is going to be ~3,060 since I was still almost 2 inches high at 3.5.
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how is that round man?Today's practice session. 26" 6x47L barrel spitting 107smks at 2900. April 5th is her first match.
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It does well enough. I'd probably do a dasher or GT if I had to do it over again. They just seem easier to load for. My buddy had a 6x47 reamer and I had a bunch of 6.5x47 brass so it was easy to do. I was thinking it would be as easy to setup as my 6.5x47 (my favorite round) but it isn't. Not bad but not 6.5x47 easy.how is that round man?
I'm near convinced I could throw anything into a 6.5x47 case and it would give me results i could compete with.6 dasher and 6.5x47 are the easiest rounds I have ever loaded for.
Dude, I shot 6cm most 2024 and love the round. Good work. Sometimes hard to spot impacts here in South TX summer but i like that round a lot.
It burns barrels quick though
I'm near convinced I could throw anything into a 6.5x47 case and it would give me results i could compete with.
If you were worried about support as a civilian in the first place, AI is the wrong brand. That said, I sent my AX in for service post discontinuation and didn’t have any issues.Since i couldnt get the 50cal, some money is left to do some foolish stuff
I have all the rifles i need and prefer to practice a lot.
Right now stumbled across an unfired axmc in sage green.
I have not seen any troubles with those rifles besides the lfp/sfp. Interested in 308/338lm only. Rifle comes with both bolts, mag change kit and barrels.
Biggest concern right now is the fact the model is discontinued. Thinking of how lost i am with finding sidestocks for my aw/awm, i am thinking about what happens if i need support with this one.
The color is great though
I prefer this one over the newer models but well...whats your opinion on the support issue?
What about the trigger, is this a comp trigger?
Any thoughts about good/bad are welcome.
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I say go for it. I like the sand elite but the green is not bad at allSince i couldnt get the 50cal, some money is left to do some foolish stuff
I have all the rifles i need and prefer to practice a lot.
Right now stumbled across an unfired axmc in sage green.
I have not seen any troubles with those rifles besides the lfp/sfp. Interested in 308/338lm only. Rifle comes with both bolts, mag change kit and barrels.
Biggest concern right now is the fact the model is discontinued. Thinking of how lost i am with finding sidestocks for my aw/awm, i am thinking about what happens if i need support with this one.
The color is great though
I prefer this one over the newer models but well...whats your opinion on the support issue?
What about the trigger, is this a comp trigger?
Any thoughts about good/bad are welcome.
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Re: AI colorPB>ES, lol.
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