Bighorn Origin Build Thread

Hondo64d

Sergeant
Belligerents
May 12, 2006
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The Big Country
Post your Bighorn Origin builds here.

Mine is another masterpiece by Jon Beanland.

Bighorn Origin
#3 Bartlein 5R chambered in 6.5 Creedmoor finished at 24”
McMillan Adjustable Game Scout in Desert Carbon Ambush
Triggertech Diamond
APA Bottom Metal
Bighorn 20 MOA rail
SWFA rings
Bushnell 3-12 LRTSi
Flush cups on left side.

Load development was easy. Wind was unusually calm so I decided to do it at 500. Not picky at all. Biggest group of the day was the 130gr Berger AR Hybrids at .632 MOA. Best was 42gr H4350 behind the Berger 140gr Elite Hunter. That went .498 MOA. Five 5-shot groups with 5 different loads averaged .555 MOA at 500 yards. Taking this one for Caribou in a couple of weeks.

John



I picked the best charge from my 500 yard load development and put 5 rounds on paper at 100 today to make sure I had a good zero. Wind was gusting hard and bench was really wobbly or it would have been better. Made a .1 adjustment and reset the zero indicator. Battery ran out on my chronograph so I made a guess on velocity and took it to 820 to use the velocity truing function on Ballistic AE. Group was 4.5” low at 820 so I put that in Ballistic AE and it determined true velocity was 2790. Fired one more group at 820 using 2790 velocity and it was centered on aiming point. I think we’re ready for Caribou.

John

 
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King_beardsly

MMPRL & Low Dollar Precision
Belligerents
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Jun 12, 2018
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Beast Coast
Screenshot_20190720-001158_Instagram.jpg
 

andrewsben

Sergeant
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May 9, 2017
391
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Beattyville Ky
View attachment 7115091
I saw this in the origin thread and started to order one. Then I saw they had the option for the defiance tenacity as well. So I ended up with 2.
 
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Sterling W

Private
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Jul 31, 2019
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0
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I have an origin on order. I'll try to remember to post here when it's done. I'm a photographer so there will definitely be some photos of it on here and instagram - @sterling.a.williams
 

RFutch

Sergeant
Belligerents
Sep 28, 2010
855
261
69
38
Georgia
Update to my pic above. Finally got my third Origin put together. I think I might have a problem...

PVA 224 Valkyrie 26” Heavy Palma 1/7
KRG Bravo
TriggerTech Flat Primary
NF 3.5-15X50 in Sekins Rings

Using old AI 223 polymer mags. Shot 60 rounds with no malfunctions today.

E8B1502C-0C0A-43AC-81D2-6BE8CAF03B26.jpeg
814608CD-EE6E-46CD-9269-B60FF2BE57F4.png
 

stevieb92

Private
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Aug 24, 2012
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Sewickley, PA
My Origin build is as follows:
Bighorn Origin
Bartlein 1:7.5 twist Marskman contour 5R barrel finished at 26 inch
Chambered by SPR in 6mm Creedmoor for 108 ELD-M
MPA BA Comp chassis (tungsten)
Vortex Razor Gen 2 4.5-27x56 EBR-2C mrad
Trigger Tech Special flat black
Vortex/Seekins PMR
Thunderbeast brake (TBAC Ultra 7 is in jail)

 
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kriller134

Private
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Jul 9, 2017
569
506
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orange county, ca
Second barrel for this Origin
26" Bartlein MTU 1:8 5R chambered in 6.5x47 by XR Gun Works
MPA oldschool comp chassis
Vortex Razor Gen 2 in Spuhr 4001
Trigger Tech Diamond pro curve
Area 419 Sidewinder

View attachment 7133880

View attachment 7133881
Off topic here, but is the adapter plate necessary for the anvil 30? You can’t mount it on the stock plate and stud it comes with?
 

Meety Peety

It's possible
Hessian
Belligerents
Minuteman
Dec 15, 2017
123
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San Diego
Off topic here, but is the adapter plate necessary for the anvil 30? You can’t mount it on the stock plate and stud it comes with?
You could screw it directly onto the stock Leofoto plate but due to the placement of the little set screw on the underside of the stock plate and the small size of the "stem" of the Anvil 30, you would have no retention on the ball head (Other than the torque you applied when you tightened it down). Movement in the counterclockwise direction would basically unscrew the ballhead and you would have it coming loose all the time, especially with a rifle mounted. You could probably solve this problem by drilling a hole in the stock Leofoto plate that is closer to the center of the stem which would allow you to run a screw into the Anvil 30. I have not done it or seen anyone do it, but I'm sure it could be done if you were inclined to give it a try.
 

kriller134

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orange county, ca
You could screw it directly onto the stock Leofoto plate but due to the placement of the little set screw on the underside of the stock plate and the small size of the "stem" of the Anvil 30, you would have no retention on the ball head (Other than the torque you applied when you tightened it down). Movement in the counterclockwise direction would basically unscrew the ballhead and you would have it coming loose all the time, especially with a rifle mounted. You could probably solve this problem by drilling a hole in the stock Leofoto plate that is closer to the center of the stem which would allow you to run a screw into the Anvil 30. I have not done it or seen anyone do it, but I'm sure it could be done if you were inclined to give it a try.
Thanks for the info! That makes sense. I’m assuming that the rrs plate is bolted to the anvil 30 to prevent it from loosening? Thanks for your help. I’m looking to get the same setup as yours and it’s confusing me not being able to see it in person.
 

Meety Peety

It's possible
Hessian
Belligerents
Minuteman
Dec 15, 2017
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San Diego
Thanks for the info! That makes sense. I’m assuming that the rrs plate is bolted to the anvil 30 to prevent it from loosening? Thanks for your help. I’m looking to get the same setup as yours and it’s confusing me not being able to see it in person.
Yea it is and the stem of the ballhead sits in a nice little pocket in the RRS plate. I'll snap a picture of it tomorrow when I get a chance. I see that you're in orange county.. if you are free Sunday and want to swing down to the Pala match you can check it out in person and shoot off of it.

 

kriller134

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orange county, ca
Yea it is and the stem of the ballhead sits in a nice little pocket in the RRS plate. I'll snap a picture of it tomorrow when I get a chance. I see that you're in orange county.. if you are free Sunday and want to swing down to the Pala match you can check it out in person and shoot off of it.

Got the clear for Sunday from the wife. I think I have enough ammo for the match. Gotta double check.
 

NICETRY

Sergeant
Belligerents
Apr 14, 2013
300
44
34
Oklahoma
Wife shot this one at this years Nightforce ELR match in Wyoming. Good for sending the 131 Blackjack bullet at 3340fps.

Bighorn Origin #2
25 SAUM / 7.5 twist 27” M24 Bartlien
Custom XLR Envy with Ingenuity Gunworks rail and mercury tube.
Bix’n Andy TacSport 2 stage
ARC rings and 5-25 ATACR F1
TBAC Ultra 7
7841767C-2429-4EFE-9575-6BA20DFD5DCA.jpeg060BD128-3C8F-4AC5-A861-DD7CE67B2A4E.jpeg
 

mm1046256

Private
Minuteman
May 31, 2018
4
1
6
Anybody with a Bighorn Origin in a Cadex chassis? I have a barreled action on order at the moment from Altus Shooting Solutions w/Proof Research Competition profile barrel, 6.5 PRC, and I'm hoping there won't be any compatibility issues with my Cadex Field OT chassis (recoil lugs/picatinny rail). Currently have a MDT 12-rd (no binder plate) magazine for it as well.
 
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Browerka

Private
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Feb 27, 2017
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Virginia
How do you like the 6BR from josh over at PVA, he did my 6creed for my origin and will be doing a 6BR AI for my TL3 that I just picked up.
The BRs and variants are so easy to load for. Combine that with good components and quality gunsmith it’s an awesome combination!
 

m700.308

Sergeant of the Hide
Minuteman
Dec 3, 2013
184
61
34
Here are my twins.

Top is a 6BR
26" Bartlien, 7.25 twist, Heavy Palma
TT Diamond
MPA w/Weight Kit - 21.2lbs (because you know, BR's have a ton of recoil!)
419 Brake
Vortex Gen 2 4.5x27

Bottom is a .223
26" Bartlien, 7 twist, Heavy Palma
TT Diamond
MPA
419 Thunderbeast adapter
TB Ultra 7
Vortex AMG
It weighs just over 15lbs

Both chambered by WAR rifles out of Manassas VA. Hammers!!

IMG_1770 (2).jpg
 

725franky

Sergeant
Belligerents
Dec 7, 2010
157
3
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Michigan
Anyone using the RRS 34mm mount on your Origin?

I have an Origin action on the way, as well as a Steiner P4xi 4-16 x 56 optic. I'd like to not have an overly large gap between the objective and my barrel (so as to keep a lower cheek-weld scenario). I am considering the RRS mount because it incorporates the level indicator into the mount (one less thing to buy and fiddle with), but I am worried that it may be kind of tall...

Any help?