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Bighorn Origin Build Thread

The radii around the notch in the front of the magazine well were increased so rounds won't hang up and the front was pushed forward a very small amount to accommodate the OAL that magazine system allows.

Thanks - Ray
Will you be offering a service to add the radii to older actions?
 
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Big Horn Origin .223 Rem
- 26” Proof prefit 1:7 twist
- 2 stage Triggertech Special
- Manners T4A team elite - swamp
- Area 419 14” Arca rail
- Vortex Razor gen 2 - 4.5-27x56
- Vortex PMR rings - 1.1”
- Acurracy 1st scope level
- mischief machine throw lever
- MDT .223 mag
- DeadAir Sandman-S
- Rifles Only MAD suppressor cover
 
Building a LA Origin - haven't sourced a stock yet... trying to weigh my options.

I know Ray posted in this thread a while back that the SA Origin will work in Manners stocks inlet for Rem 700 with some minor modification of the cutout for the ejection port... there's a pic floating around here somewhere. Is the same true for Long Actions? Also - what about stocks inlet for other Rem 700 clones - any insight if they will work?

I emailed Ray/Zermatt as well, so I will update the thread when I hear - but also figured some people here probably have experience.
 
Building a LA Origin - haven't sourced a stock yet... trying to weigh my options.

I know Ray posted in this thread a while back that the SA Origin will work in Manners stocks inlet for Rem 700 with some minor modification of the cutout for the ejection port... there's a pic floating around here somewhere. Is the same true for Long Actions? Also - what about stocks inlet for other Rem 700 clones - any insight if they will work?

I emailed Ray/Zermatt as well, so I will update the thread when I hear - but also figured some people here probably have experience.
Yes, this is true for LA Origin as well. If the stock comes up high enough for a port cut then it will most likely need to be extended.
 
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Yes, this is true for LA Origin as well. If the stock comes up high enough for a port cut then it will most likely need to be extended.
Perfect, thanks. Are all these rem clones mostly interchangable with slight mods as well... ex: Bighorn in a Impact inlet, and vice versa?
 
Perfect, thanks. Are all these rem clones mostly interchangable with slight mods as well... ex: Bighorn in a Impact inlet, and vice versa?
For the most part. The areas to watch: trigger hanger vs non, bolt release, bolt handle swept vs straight, and ejection port. All can be corrected with Dremel or smith.
 
Just put the first 15 or so rounds through this one today. It took 3 shots to sight in, 2 at 25 then 1 at 100. Then just some random loads with factory 2nd 212gr ELDX and Ramshot Magnum powder to run through the Proof barrel break-in instructions, but it shoots better than me already.

Origin LA Magnum
300 PRC 24" Proof Prefit
KRG Bravo
TriggerTech Diamond
KRG AICS CIP Mags
Viper PST Gen2 5-25 Mil

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I sent Altus a pile of money, and got it put together last weekend.
Short action Origin with the tactical knob
26" Bartlein prefit in 6mm BR
MDT 6BR mag
TT Diamond
Painted KRG Bravo
I stole the scope and Harris bipod off my Savage, I need lower rings. The scope will get upgraded next year. I will eventually get a dedicated suppressor for it, for now I have to share my form 1 can between this and my AR.

I only have 60 rds through it, but it already shoots great. It is the smoothest rifle I've owned. I am very happy with it.
 
This one has changed a lot of times simply due to 2 actions, 6 chassis/stocks, 8 barrels and probably 5 different scopes that are all a part of a never ending truffle shuffle...but this one is pretty fun.
Only forseeable change is that I'm considering a VUDU 5-25x with an H59 for the glass. The proximity to the MUNSTER EFR up front means I can't take advantage of the Tenebrex caps.

Zermatt TL3 18" 22 Creed with a 7 twist
Right now I'm testing 69 TGKs for predators, but will likely consider 80-90gr bullets later on.
Trigger Tech Diamond and the Oneill Ops 224 VAPR suppressor for this one and pretty much everything else should be outlined in the picture.

View attachment 7808452
Which stock is this? Pretty sick. 👌
 
Took my 223 AI out to South Dakota for some prairie dog shooting. The Origin was great out there. Shooting
mostly 60gr Sierra TMK loads @ 3360 fps and 40 gr VMAX fireforming loads @ 3800 fps. With sustained winds at 15-25 and gusts up to around 30 mph, shots 500 yards and out were interesting!

Zermatt Origin Action
26" Criterion 1-8 twist in 223 Ackley
Trigger Tech Special
KRG Whiskey 3 w/Enclosed Forend
Gen II Razor 4.5-27
ARC Rings
Accurate 223 Mag
Atlas CAL Bipod that never was used
Vortex Carbon tripod

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Has anyone tried doing a 277 Fury build in an Origin Action? Can it handle the cartridges with the metal base?

It seems like one could build a lightweight hunting rig with a short(ish) barrel with that cartridge.
 
6mm ARC
Proof "Prefit 6mm ARC Sendero 22"............hell of a deal from Stocky's on 4th of July sale.
Torqued to 60 FT/LBS
Bergara HMR Stock (I had to open up the barrel channel)
Trigger Tech Primary July 4th edition set at 1.5lbs
MDT Metal Mag 10rnd
Seekins Low 34mm rings
Bushnell Elite Tactical DMR3 3.5-21x50 (G4 ret)
First 50 rounds out of setup AVG Group size (3 shot groups) just under 1/2 MOA on a variable windy day. Largest 100 yard group was .650". I'm super happy with this setup. Only fired FACTORY Hornady 105 HPBT Black ammo.
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first group at 100 yds
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Another group @100 yds
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about 35 rounds through the rifle (No cleaning other than initial cleanout, cause....."#breakinisbullshit"

200 yard groups
oAXjWgF.jpg


200 yards
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Last group, 100 yards..............Never cleaned other than initial cleanout of barrel prior to install. Rounds 48,49,and 50.

K7ftt2f.jpg
 
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Has anyone tried doing a 277 Fury build in an Origin Action? Can it handle the cartridges with the metal base?

It seems like one could build a lightweight hunting rig with a short(ish) barrel with that cartridge.
I don't think that'd make a lot of sense, at least yet, as loaded ammo, let alone dies, brass, etc are not yet available.

Sig did that short run, but the only gun for it so far was the spear.

I really like the idea, and intended to get a cross when it came out, but they're not even following their own spec with the barrel twist on that rifle and it won't be capable of shooting the bullets I like to use.
 
I don't think that'd make a lot of sense, at least yet, as loaded ammo, let alone dies, brass, etc are not yet available.

Sig did that short run, but the only gun for it so far was the spear.

I really like the idea, and intended to get a cross when it came out, but they're not even following their own spec with the barrel twist on that rifle and it won't be capable of shooting the bullets I like to use.

If the army goes forward with the new rifle, I figure it will become a common cartridge at some point.

My Origin is going to be a 280 AI, but a short lightweight barrel might be a good 2nd barrel for hunting and hiking.
 
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I am planning to build a .280AI as well. I'm hoping I can watch your posts and see your build.
 
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Origin 6.5 CM
20” proof carbon sendero
Manners LRH
Hawkins rings and DBM
Mark 5 HD 3.6-18 - illum
Foundation Arca rail
Atlas Cal Gen 2

Rifle weight - 11 lbs as shown
 

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My palma rifle I built last winter. Origin SA, 31" Bartlein heavy palma 1:7 in .223, .110 freebore for 80's, 88's, and 90's, Eliseo RTS stock. I built this thinking I'd make a across the course/prone rifle combo, but I've never used it as anything but a single shot thus far. It usually wears iron sights for Palma matches (.223 or .308, iron sights only, 300 to 1000 yards), but I've shot it with a scope for midrange matches quite a bit lately.

Best scores so far have been 200-13X at 300 yards, 200-10X at 500, 200-9x at 600, and 196-9X at 1000 yards.

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.
Screenshot_20220719-090529_Chrome.jpg
IMG_20210317_150925_849.jpg
 
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Origin SA with Helical Diamond bolt knob
22" Proof Sendero prefit............6mm ARC
PVA Jet Blast (3 port 6mm diam brake)
Trigger Tech (July 4th special trigger)
"Greyboe bottom metal"....IE Hawkins
Mesa Precision Arms Altitude stock (Timberline Camo)
Seekins precision Low rings
Bushnell Elite Tactical DMR 3.5-21x50 G4 ret

With less than 80 rounds through the rifle, it's consistently 1/2 MOA or less at 100 and 200 yards with factory Hornady Black 105gr HPBT ammo.

Really happy with this package.

kptEJ4S.jpg

UIlBev7.jpg


100 yds....Hornady Black. First few groups in the new Mesa Precision stock.
HUCebzl.jpg


200 yards....Hornady Black.
ckh989T.jpg

IEjym63.jpg
 
Hey guys - quick question... google didnt yield any results. I can call zermatt tomorrow but thought I might get lucky on here tonight.

I am building my Origin tonight. I'd like to remove the rail - my barrel vise shims are not tapered, so I'd rather put the metal portion near the tenon in the vise to ensure i get a good hold (it is not tapered either). I cant do that and still mount the action because the rail is in the way.

I unscrewed the rail and that bitch ain't coming apart - and certainly isnt hand right. I assume its pinned, and it seems like its on there pretty good.

Is it easy to knock off with a rubber mallet or am I going to get myself in trouble here?
 
Hey folks!

I am so, so stoked to share my hunting rifle with you all. I finally after years of shooting LR and hunting have a dedicated hunting rifle. I picked it up from my smith today after a full glass bed, and will break it in tomorrow.

This is my 6.5 PRC hunting rig. It'll be used for deer and elk in Colorado out to 500 yards. I wanted a rifle that felt like a precision rifle, and can be treated like a precision rifle, but was light enough to walk straight up mountains. Weight is 11lbs 1oz as shown, no sling or loaded mag. 11lbs 8oz with sling and mag.

It's a 24" Shilen heavy sporter with a blended brake on a Bighorn Origin long action. It sits in a Manners EH1 stock, with added spacer adjustable cheek system, with Hawkins 300 win mag length bottom metal. Optic is a Bushnell LRHS2 4.5-18, on Hawkins rings. Bipod is an atlas v8, and I've added a Henderson Precision arca rail to the stock. Trigger tech primary flat face for the trigger. And not shown, but will be heavily used, and self promoted...Longtucky Supply sling.

I went with a long action because it's a dedicated hunting rig. I can use every part over again, but barrels are consumable, and I intend to consume them. With a long action, I can swap to whatever cartridge fits my needs down the line.

Optic was chosen for its weight, reticle, locking turrets, and glass quality. It's a solid blend of everything.

The Manners eh1 is interesting. I knew I wanted an adjustable cheek piece for rifle setup, but I didn't want the extra lb of the eh1a. I found the manners ultralight riser kit, and it's simple but works. It's a spacer stack with a carbon fiber riser, not much to it. The stock had to be glass bedded, and my smith used g10 pillars.

I can't wait to go shoot this rifle and hopefully harvest some animals.

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PXL_20220817_005501228~2.jpg
 
It is pinned as well.
Hey guys - quick question... google didnt yield any results. I can call zermatt tomorrow but thought I might get lucky on here tonight.

I am building my Origin tonight. I'd like to remove the rail - my barrel vise shims are not tapered, so I'd rather put the metal portion near the tenon in the vise to ensure i get a good hold (it is not tapered either). I cant do that and still mount the action because the rail is in the way.

I unscrewed the rail and that bitch ain't coming apart - and certainly isnt hand right. I assume its pinned, and it seems like its on there pretty good.

Is it easy to knock off with a rubber mallet or am I going to get myself in trouble here?
It is pinned as well, should lift off.
 
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If tapping on the overhang isn’t working, or you can’t get at it. Install a scope ring or rings on the rail and slip a dowel through, or lapping bar, alignment rods, whatever and use that as a handle to lift it straight up.
 
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If tapping on the overhang isn’t working, or you can’t get at it. Install a scope ring or rings on the rail and slip a dowel through, or lapping bar, alignment rods, whatever and use that as a handle to lift it straight up.
Good idea, tapping didn't work.

I got it hand tightened then was able to slip the shim on and angle it correctly on the vise so there was a tiny bit of clearance as long as it didn't slip, which luckily it did not. Wasn't ideal but after some pain and annoyance I got it torqued to 100 ft lbs (it's a long action magnum).

Thanks everyone for the quick responses.
 
Hey guys - quick question... google didnt yield any results. I can call zermatt tomorrow but thought I might get lucky on here tonight.

I am building my Origin tonight. I'd like to remove the rail - my barrel vise shims are not tapered, so I'd rather put the metal portion near the tenon in the vise to ensure i get a good hold (it is not tapered either). I cant do that and still mount the action because the rail is in the way.

I unscrewed the rail and that bitch ain't coming apart - and certainly isnt hand right. I assume its pinned, and it seems like its on there pretty good.

Is it easy to knock off with a rubber mallet or am I going to get myself in trouble here?
The easiest way I've found to remove the rail is to remove all (4) screws and put the front of the rail on a wooden work bench and push down on the receiver. The front pin will pop out with some force then you can wiggle the rail off by hand. If that doesn't work, throw some leather stripping in a vise and clamp on the rail then use an action wrench to gain leverage on the receiver.

The pins are intended to be tight, so this isn't abnormal.

Thanks - Ray
 
Looking to build a 30-06 on an Origin LA with the Hawkins Hunter. What exactly do I need to have the smith do for this combination to work?
 
Looking to build a 30-06 on an Origin LA with the Hawkins Hunter. What exactly do I need to have the smith do for this combination to work?
Nothing special really. The Long Action Hawkins Hunter will work fine. The only thing is to check the pillar or bedding block heights to ensure they are the same or nearly the same lengths as the Hawkins pillars sent with the bottom metal.

This is a CIP 300 PRC Hawkins Hunter
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Big horn origin short action 25” x caliber blank
Chambered in a wildcat 6mm lynx 2. Middle ground between dasher and the 6gt. Formed from either brass and had it before the gt came out. Mdt ess chassis and mdt 6br mag. Now lives life in an xrs chassis and has a 6mm dasher barrel on it for better brass life and ease of obtaining ready to load brass.
C01920F2-2B25-4D14-8131-69348E8E1E1D.jpeg
 
Origin SA with Helical Diamond bolt knob
22" Proof Sendero prefit............6mm ARC
PVA Jet Blast (3 port 6mm diam brake)
Trigger Tech (July 4th special trigger)
"Greyboe bottom metal"....IE Hawkins
Mesa Precision Arms Altitude stock (Timberline Camo)
Seekins precision Low rings
Bushnell Elite Tactical DMR 3.5-21x50 G4 ret

With less than 80 rounds through the rifle, it's consistently 1/2 MOA or less at 100 and 200 yards with factory Hornady Black 105gr HPBT ammo.

Really happy with this package.

kptEJ4S.jpg

UIlBev7.jpg


100 yds....Hornady Black. First few groups in the new Mesa Precision stock.
HUCebzl.jpg


200 yards....Hornady Black.
ckh989T.jpg

IEjym63.jpg
Really diggin that look!!!

My Tikka T3 hunting rifle hammers and your pics/set-up makes me lust after one similar to that!!
 
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My palma rifle I built last winter. Origin SA, 31" Bartlein heavy palma 1:7 in .223, .110 freebore for 80's, 88's, and 90's, Eliseo RTS stock. I built this thinking I'd make a across the course/prone rifle combo, but I've never used it as anything but a single shot thus far. It usually wears iron sights for Palma matches (.223 or .308, iron sights only, 300 to 1000 yards), but I've shot it with a scope for midrange matches quite a bit lately.

Best scores so far have been 200-13X at 300 yards, 200-10X at 500, 200-9x at 600, and 196-9X at 1000 yards.

View attachment 7921190

.
View attachment 7921138View attachment 7921137

Gonna show my ignorance here……what is that thing?

Looks like a home machined rifle; which would make it even more cool.

If manufactured, who makes it. I would like to read up and learn. Not a big AR guy or chassis gun guy, but that rifle is pretty unique and makes me want to know more.

Apparently it is a Big Horn Origin action inside of the upper “shell system”? Is the upper specifically designed for the Origin or any Rem 700 clone with straight bolt?

PS - please dear lord let me send you a different AR pistol grip. The mil-spec A2 style grip leaves much to be desired on such a unique system.
 
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Gonna show my ignorance here……what is that thing?

Looks like a home machined rifle; which would make it even more cool.

If manufactured, who makes it. I would like to read up and learn. Not a big AR guy or chassis gun guy, but that rifle is pretty unique and makes me want to know more.

Apparently it is a Big Horn Origin action inside of the upper “shell system”? Is the upper specifically designed for the Origin or any Rem 700 clone with straight bolt?

PS - please dear lord let me send you a different AR pistol grip. The mil-spec A2 style grip leaves much to be desired on such a unique system.
It’s an elisio
 
Gonna show my ignorance here……what is that thing?

PS - please dear lord let me send you a different AR pistol grip. The mil-spec A2 style grip leaves much to be desired on such a unique system.
It's an Eliseo RTS chassis for any SA Remington 700 or clone. I'd say 50% of all the prone rifles you see on the line at high power matches now are in one of Gary's setups. Mine is setup for AICS magazines, but most are set up for single shot actions.

Gary Eliseo is the real deal. He is as good as they come.

www.gotxring.com

I actually have a Sierra/Tubb grip on it now, but I'd be just fine with an A2. I cut my teeth shooting service rifle, so now they are more comfortable than almost any other AR grip. Ive got giant hands (size 16 ring, can palm a basketball), so most grips with finger grooves don't work at all for me. Magpul MOE grips are good, but I prefer the A2.
 
View attachment 7858967
Big Horn Origin .223 Rem
- 26” Proof prefit 1:7 twist
- 2 stage Triggertech Special
- Manners T4A team elite - swamp
- Area 419 14” Arca rail
- Vortex Razor gen 2 - 4.5-27x56
- Vortex PMR rings - 1.1”
- Acurracy 1st scope level
- mischief machine throw lever
- MDT .223 mag
- DeadAir Sandman-S
- Rifles Only MAD suppressor cover
I've been trying to decide on a 24" barrel vs a 26", I will also be suppressing it. I want to get your opinion on 26" + suppressed. Do you find it to be too long?
 
I've been trying to decide on a 24" barrel vs a 26", I will also be suppressing it. I want to get your opinion on 26" + suppressed. Do you find it to be too long?
For a comp gun it’s not a big deal. For a hunting rifle I would say 24 over 26.
 
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I've been trying to decide on a 24" barrel vs a 26", I will also be suppressing it. I want to get your opinion on 26" + suppressed. Do you find it to be too long?
I think it comes down to how the rifle balances, suppressor length and weight, and desired velocity.

I was running a 26” prefit, because that’s what Proof sells, it was stupid accurate shooting Remington 77 grain SMK factory ammo