Hello, I am new to the forum and look forward to the information exchange. I have just completed the build out of my Grendel upper two weeks ago. I also reloaded using Hornady 123 A Max bullet with a powder charge at 26.5; 27.0; 27.5; and 28.0 grains of IMR 4895. I was pleased with the results, so far. I intend to experiment with different powders, but is down the road. So, this is my introduction and look forward to the discussions in this forum.
Hello, new to the forum
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Welcome aboard Stanley!
One thing I would recommend is that with the Grendel case, use .3gr increments for your load testing when increasing the charge weight, since that is about 1% of case volume.
The Grendel will hold ~35gr of H2O, and most powder charges are in the 27.0-34.0 range, so call it 30gr average of usable powder capacity. 1% of 30 = .3gr.
In my .260 Remington, I use .4gr increments since most of my loads are in the 40-42gr region. With my .270 Winchester, I use .5 or .6gr increments since many of the charge weights are in the 53-60gr range.
Have you seen the 6.5 Grendel Reloading Handbooks we put together as a forum? There is a ton of data in them, as well as specific load procedures and component considerations for the AR15/6.5 Grendel, terminal ballistics testing, hunting considerations, maximum effective ranges based on bullet expansion thresholds, point blank zeros for different barrel lengths, optics, cartridge history, gas system and barrel lengths, etc.NRA Basic, Pistol, Rifle, Shotgun, RSO
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
www.AR15buildbox.com
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