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Sig Sauer 556R to 6.5 Grendel

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Sig Sauer 556R to 6.5 Grendel
apd_855 Offline
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#1
05-18-2015, 04:55 AM
Had a 556R that just sat in the safe with no love, so I decided to give her some. The process was pretty straight foreward with the exception of the mag well. Chambered an X-Caliber 6.5 barrel blank and reverse enginered the 7.62 barrel threads and conture. Original build thread: http://www.sigarms556.com/threads/556r-t...del.15300/
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Variable Offline
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#2
05-18-2015, 11:44 AM
Wow, that's really cool! You have some excellent skill Sir! Big Grin

From your 1:30 ejection pattern, it sounds like the gas is pretty robust Wink

I'm sure you'll get it tuned though. Looking forward to future posts!
Life member NRA, SAF, GOA, WVSRPA (and VFW). Also member WVCDL. Join NOW!!!!!
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cory Offline
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#3
05-18-2015, 01:16 PM
Very interesting read!
"Those who sacrifice liberty for security, deserve neither." Benjamin Franklin
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lrgrendel Offline
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#4
05-18-2015, 05:05 PM
Very nice. Is that the first Sig conversion to 6.5 Grendel on this forum?
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Big J Offline
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#5
05-18-2015, 11:25 PM
That is awesome! Great work, one of the coolest builds I've seen.
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LRRPF52 Offline
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#6
05-18-2015, 11:45 PM
That really is impressive work. How does it shoot? Feel free to post pics here, and welcome aboard.
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6.5 Grendel Reloading Handbooks & chamber brushes can be found here:

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apd_855 Offline
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#7
05-18-2015, 11:54 PM
I haven't shot it for groups yet, I've got too many irons in the fire right now. I have been working up loads for a 20 Practical and Grendel build for praire dog season. Once things slow down a little I will wring out the Sig. I still need to get glass and work up a load it likes. Hopefully in the next few weeks.
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