Bolt action Hornady 129 Interbond load

[BjornF16]

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

[XcountryRider]

You think that load 31.5 is to much for a AR?

[BjornF16]

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/showt...nd-the-Grendel

[XcountryRider]

With hornady reloading data its showing slower velocities than AA2520.

[BjornF16]

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