Bighorn Origin Build Thread

#651
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.
 

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#653
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?
 
#657
Outlaw45 said:
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?
Click to expand...
X-Low should work. I run the XLow with Vortex pst2 3-15x44mm with M24/40 bbl
 
#659
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?
 
#660
Rant Durden said:
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?
Click to expand...
I check headspace every time on every caliber. I am a fan of my face in its current configuration. 💥
 
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#661
Rant Durden said:
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?
Click to expand...
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
 
#666
spife7980 said:
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.
Click to expand...
Ok, thanks.
Midway is having a sale so I might just do that.
Stupid question, what kind of tape and where?
 
#669
Rant Durden said:
Ok, thanks.
Midway is having a sale so I might just do that.
Stupid question, what kind of tape and where?
Click to expand...
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.
 
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#677
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.
217593983_2925858491007486_8354431415839511055_n.jpg

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.

B7DDF001-EAF3-4E3F-ACF7-CF769032B198.jpeg
 
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#678
Dolomite_Supafly said:
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
Click to expand...
What's that thing gonna be used for?
 
#680
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.
 

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#683
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

tempImageuo6SNR.png
tempImagePi6WxX.png





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:

tempImage6SDoG7.png

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

tempImage4wuxUp.pngtempImageacCUWv.png

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

tempImageghG01q.png
 
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#684
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😍
 

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#685
ceekay1 said:
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
Click to expand...
Oh boy she’s a beaut clark!
 
#686
ceekay1 said:
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
Click to expand...
Love the spitfire sticker and that manners stock is sexy.
 
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#687
#693
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
20210827_183138.jpg
 
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#696
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.
 
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