Bighorn Origin Build Thread

[ThePewFactor]

New build underway by Keystone Accuracy

Zermatt/Big Horn Origin, 22" Bartlein Carbon Fiber 223 Wylde. Trigger Tech Diamond, KRG Bravo, Deadair 5/8x24 Keymo brake.

 

[BigTy313]

New build underway by Keystone Accuracy

Zermatt/Big Horn Origin, 22" Bartlein Carbon Fiber 22e Wylde. TRigger Tech Diamond, KRG Bravo, Deadair 5/8x24 Keymo brake.

Looking good.

 

[Outlaw45]

Being controlled round feed, can I still single feed a round by dropping it in the chamber? Or does it have to feed from the mag?

Also, anybody know what height ARC rings to run with a Mk5hd 3.8-18x44?

 

[Vandoogle13]

Being controlled round feed, can I still single feed a round by dropping it in the chamber? Or does it have to feed from the mag?

Also, anybody know what height ARC rings to run with a Mk5hd 3.8-18x44?

Single feeding is completely fine!
I'm not sure on the ring height, what profile barrel?

 

[Outlaw45]

Light palma.

 

[Vandoogle13]

Light palma.

The lows will be fine

 

[Dooby]

Being controlled round feed, can I still single feed a round by dropping it in the chamber? Or does it have to feed from the mag?

Also, anybody know what height ARC rings to run with a Mk5hd 3.8-18x44?

X-Low should work. I run the XLow with Vortex pst2 3-15x44mm with M24/40 bbl

 

[Vandoogle13]

X-Low should work. I run the XLow with Vortex pst2 3-15x44mm with M24/40 bbl

ARC doesn't make x-lows for 35mm tubes...

 

[Rant Durden]

So I have a Origin newbie question; do I need to do go/no go's on my build. I have two days to get my receiver, then I can put it all together. If I torque to speck do I need to worry about gauging it?

 

[DJ 480]

So I have a Origin newbie question; do I need to do go/no go's on my build. I have two days to get my receiver, then I can put it all together. If I torque to speck do I need to worry about gauging it?

I check headspace every time on every caliber. I am a fan of my face in its current configuration.

 

[Jabot]

So I have a Origin newbie question; do I need to do go/no go's on my build. I have two days to get my receiver, then I can put it all together. If I torque to speck do I need to worry about gauging it?

I use unfired brass and tape to check headspace. Tape goes on case head. U can probably find a video on how to do it correctly! Important

 

[midwestoffroad]

Is it a shouldered prefit or barrel nut.

 

[Rant Durden]

Is it a shouldered prefit or barrel nut.

Sorry,
shouldered prefit.

 

[midwestoffroad]

You should be good to go as long as it was a. Reputable smith that offers prefits

 

[spife7980]

Sorry,
shouldered prefit.

I only use a go gauge, with scotch tape to make it a nogo, but I check every barrel that goes on since it’ll have 60k psi trying to poke my eye out.

With a shouldered you’re checking, not setting.
Trust but verify.

 

[Rant Durden]

I only use a go gauge, with scotch tape to make it a nogo, but I check every barrel that goes on since it’ll have 60k psi trying to poke my eye out.

With a shouldered you’re checking, not setting.
Trust but verify.

Ok, thanks.
Midway is having a sale so I might just do that.
Stupid question, what kind of tape and where?

 

[Rant Durden]

You should be good to go as long as it was a. Reputable smith that offers prefits

Yea, PVA did it so I think I’m safe in that respect.

 

[midwestoffroad]

Yeah your good

 

[spife7980]

Ok, thanks.
Midway is having a sale so I might just do that.
Stupid question, what kind of tape and where?

Normal everyday scotch tape. I put a layer on the back of the go gauge and trim the overhang with a razor and voila, you made a no go gauge. Measuring it your your reloading case comparator (or shit, just oal if you only have calipers still works for telling the relative gauge length) will let you see exactly far out from go you are. So you can stack layers of tape to see just how much extra space you have if it’s longer rather than shorter on headspace.

 

[kmdn_crew]

Even with a shouldered prefit barrel it is a good idea to check headspacing. Somehow I have managed to never purchase my own set of gauges. I am on the go-no go loaner program lol.

 

[OkayshooterSK2]

200 rounds in on my new Origin build and am LOVING it. And the Bravo might be one of the most comfortable stocks IMO. Filled all the voids with steel BB’s and epoxy along with a weighted arca rail from KRG and as it sits I’m 23 pounds.

 

[Chargerguy]

Would graphite black be the closest cerakote match to the nitride finish of the Origin?

 

[midwestoffroad]

Would graphite black be the closest cerakote match to the nitride finish of the Origin?

The nitride is still gonna have a shine to it. But graphite black is probably the closest

 

[kmdn_crew]

Love my Origin!

 

[Dolomite_Supafly]

I am building one in 458 SOCOM with a 10” barrel and a 16” silencer.

Going to use magnum brass to up the pressures to launch lathe turned bullets.

It is a work in progress at the moment.

 

[RFutch]

 

[Dolomite_Supafly]

And I finally got the silencer tube for the 458 SOCOM above. Still need to build the guts but this is how it should look. It may not look straight because it is just the tube laid there, I haven't built the end caps yet.


ETA: That is a hand made bullet to get the weight for stability calculations. It is 3” long and 850 grains and out of a 10 twist it would be stable (barely). I will likely use the 600+g bullets from a manufacturer though.

I am also going to shoot my 575g bullet. It is a hammer.

 

[stello1001]

And I finally got the silencer tube for the 458 SOCOM above. Still need to build the guts but this is how it should look. It may not look straight because it is just the tube laid there, I haven't built the end caps yet.
View attachment 7671871

ETA: That is a hand made bullet to get the weight for stability calculations. It is 3” long and 850 grains and out of a 10 twist it would be stable (barely). I will likely use the 600+g bullets from a manufacturer though.

I am also going to shoot my 575g bullet. It is a hammer.

View attachment 7671982

What's that thing gonna be used for?

 

[Dolomite_Supafly]

What's that thing gonna be used for?

Launching HEAVY bullets at subsonic velocities. Ringing steel mostly.

 

[Dolomite_Supafly]

I also threaded the OD of the barrel to accept a standard AR barrel nut. I screw the barrel nut on, torque it down and then install the handguard. Any standard AR handguard will work.

Next is to thread the muzzle 3/4”-24 and make an adapter to go from 3/4”-24 to 1”-14. The silencer is actually for my 50 BMG which I threaded.

 

[Blaiz1]

Sure why not...

Bighorn Origin
24” Bartlein M24
Manners T4a
Triggertech Diamond
Vortex AMG
ARC M10’s
419 Hellfire
Atlas C&L
View attachment 7112525

me like

 

[Blaiz1]

me like

ok my turn
300 prc
Origin
calvin timney elite
jet blast brake
Oregon mountian barrel carbon
Ag composit stock

 

[CK1.0]

New to me Origin build in "sixty-two fitty" ...for 300rds anyways, then it'll be a 6CM. (Lapua 22-250 necked up to take a 6mm bullet, then fire-formed into 6mm Creedmoor. Just because Lapua doesn't make 6CM LRP brass doesn't mean you can't.)

Origin
Manners PRS-TCS GAP Metallic high gloss
26" 1:7.5T Proof competition contour
TT Diamond
Insite Heathen

Before anyone says "what an idiot" to using up barrel-life to fire-form... Hear me now, believe me later, it's not so bad, here's what 10 rounds at 750 yards off a Shmedium and tank-trap looked like:



...and here's what rounds #47-50 out of the barrel looked like, 4 for 4 at 1250 yards:



"sixty-two fifty" >-> 6CM:

 

[OkayshooterSK2]

Thought I better post my recent Origin transformation. Started life as a 6.5CM in a Bravo and now a 6BRA in an MPA Matrix and boy is she a shooter

 

[OkayshooterSK2]

New to me Origin build in "sixty-two fitty" ...for 300rds anyways, then it'll be a 6CM. (Lapua 22-250 necked up to take a 6mm bullet, then fire-formed into 6mm Creedmoor. Just because Lapua doesn't make 6CM LRP brass doesn't mean you can't.)

Origin
Manners PRS-TCS GAP Metallic high gloss
26" 1:7.5T Proof competition contour
TT Diamond
Insite Heathen

View attachment 7678099View attachment 7678100




Before anyone says "what an idiot" to using up barrel-life to fire-form... Hear me now, believe me later, it's not so bad, here's what 10 rounds at 750 yards off a Shmedium and tank-trap looked like:

View attachment 7678102

...and here's what rounds #47-50 out of the barrel looked like, 4 for 4 at 1250 yards:

View attachment 7678103View attachment 7678104

"sixty-two fifty" >-> 6CM:

View attachment 7678105

Oh boy she’s a beaut clark!

 

[kriller134]

New to me Origin build in "sixty-two fitty" ...for 300rds anyways, then it'll be a 6CM. (Lapua 22-250 necked up to take a 6mm bullet, then fire-formed into 6mm Creedmoor. Just because Lapua doesn't make 6CM LRP brass doesn't mean you can't.)

Origin
Manners PRS-TCS GAP Metallic high gloss
26" 1:7.5T Proof competition contour
TT Diamond
Insite Heathen

View attachment 7678099View attachment 7678100




Before anyone says "what an idiot" to using up barrel-life to fire-form... Hear me now, believe me later, it's not so bad, here's what 10 rounds at 750 yards off a Shmedium and tank-trap looked like:

View attachment 7678102

...and here's what rounds #47-50 out of the barrel looked like, 4 for 4 at 1250 yards:

View attachment 7678103View attachment 7678104

"sixty-two fifty" >-> 6CM:

View attachment 7678105

Love the spitfire sticker and that manners stock is sexy.

 

[BuLLet]

Do you have SpongeBob on that scope?

New to me Origin build in "sixty-two fitty" ...for 300rds anyways, then it'll be a 6CM. (Lapua 22-250 necked up to take a 6mm bullet, then fire-formed into 6mm Creedmoor. Just because Lapua doesn't make 6CM LRP brass doesn't mean you can't.)

Origin
Manners PRS-TCS GAP Metallic high gloss
26" 1:7.5T Proof competition contour
TT Diamond
Insite Heathen

View attachment 7678099View attachment 7678100



View attachment 7678105

 

[CK1.0]

Do you have SpongeBob on that scope?

Nope, almost, think the kid stuck sponge bob somewhere else hahaha.

...I mean, Vortex must want us to stick stickers all over them or something, why else would they make them shit brown?...

 

[OkayshooterSK2]

 

[Jackomason]

Would anyone be interested in my bighorn origin action w/ 6.5 creed barrel and 6mm BRA barrel? It has 1012 rounds on action. I got a heck of a deal on a lone peak action.

Move this to the PX

 

[MarinePMI]

@OkayshooterAJC

I'd suggest pulling your post, lest the ban hammer fall for trying to sell outside the PX.

 

[KineticPerformance]

6 Creed baked by W.A.R.

1-7.25" Krieger HP
APA Gen 2 Lil Bastard
MPA BA Comp
Huber 2-Stage

 

[Ahogue]

Changed up the rifle a bit and added some weight pulled off the proof 26in carbon and went 28in steel with a new brake and some additional weight courtesy of a steel plate between the comb

Orgin action
28in benchmark by straight jacket 6.5cm
Trigger tech primary
Area 419 sidewinder
Manners prs mini chassis
Accutac bipod
Vortex strike eagle
Seekins rings

 

[Elite_KG]

Bighorn TL3
30 Nosler
Bartlein Barrel #8 - Light Varmint Modified
Manners PRS-2
Nightforce ATACR 5-25
Self sponged Duracoat

 

[stello1001]

Bighorn TL3
30 Nosler
Bartlein Barrel
Manners PRS-2
Nightforce ATACR 5-25
Self sponged Duracoat
View attachment 7697316

This rifle is awesome. And what camo pattern is that?

 

[Elite_KG]

Camo is just a sponge pattern I did over the factory sponge. Natural seal sponge cut a bit to feather the edges. Just have all the colors you want in little dishes (I use new glass ash trays from dollar store). Start sponging in random areas and continue subsequent colors until the gun is covered. It will look fairly “blotchy” at this point. Now you continue to layer the colors overlapping. This is where feather the edge of the sponge gives the effect.

 

[Elite_KG]

Little extra…

 

[Dolomite_Supafly]

Origin SA
BnA TacSport Pro
16” McGowen barrel in 300 Blackout
KRG Bravo
SWFA 3-15
PVS-24
10” F1 silencer, all Ti, weighs 16 ounces

 

[Defender32]

PVA 22" 6.5 Creed Heavy Palma I think.
MDT ESS Chassis "No railed forearm on order"
TT 2 stage Diamond Flat
ARC Rings
Burris XTR3 5.5-30/56 SCR2 "not mounted due to full rail in the way"

Cant wait to get it fully functioning and a load worked up for it.

 

[Dolomite_Supafly]

Nice. You set this up for purely subsonic? I have a similar setup in a 16" McGowen 300BO but on a TL3.

99% of what I shoot is subsonic. I am going to launch some 175g at 1,790 to have fun with.