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+--- Thread: Bolt action Hornady 129 Interbond load (/showthread.php?tid=6598)
Bolt action Hornady 129 Interbond load - BjornF16 - 10-26-2013
Spent the day at the range today with CFE 223 and Hornady 129 Interbond. Ran a safety ladder and OCW development.
I settled with 31.8 grains of CFE 223 with 129 IB; CCI 450; AA brass. This was giving me 2550 fps, just under MOA at 200 yards with slight flattening of primers. See attached for details.
https://www.dropbox.com/s/45bfe3ki85fpx7p/Grendel%20Bolt%20129%20IB%20worksheet.pdf
Bolt action Hornady 129 Interbond load - XcountryRider - 10-26-2013
You think that load 31.5 is to much for a AR?
Bolt action Hornady 129 Interbond load - BjornF16 - 10-26-2013
Hornady lists 31.7 grains of CFE 223 as max load for ARs. At 31.5 in my gun with COL at 2.360", I had no issues (more room for powder, but closer to lands than AR gun). YMMV. I purposely did not post this in the Reloading section since I don't want anyone to transfer what I did directly to their AR. Start low, and work up.
I consulted quite a bit with a very experienced and knowledgeable forum member before striking out.
I've included a pic of the center points of my OCW groups (3 shots each charge weight). I basically chose between charge weight 3 and 4 as a likely node candidate.
Here is a link to thread about CFE in Grendel with the Hornady data: http://www.65grendel.com/forum/showthread.php?5018-CFE223-and-the-Grendel
Bolt action Hornady 129 Interbond load - XcountryRider - 10-26-2013
With hornady reloading data its showing slower velocities than AA2520.
Bolt action Hornady 129 Interbond load - BjornF16 - 10-26-2013
Yes, but AA 2520 is faster than CFE 223. After my CO hunting trip, I may experiment with AA 2520 to see what I can get.
http://hodgdon.com/burn-rate.html