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I had this barrel made a while ago, and really like it. Unlike 5.56, going a little shorter in Grendel doesn't greatly hurt performance. The 12" is a handy example of that, but we'll see what the future of this is. That', and a 14.5 pin and weld is still quite handy. It's a length I personally quite like a lot.
Since I went to the trouble of making this table from my own loads for my own usage, maybe others will benefit some as well.
I put this together to keep with my rifle, in MOA. And it took a bit of time to compile it, so here you go, others maybe can benefit as well.
-First two columns are actually 7.62x39 brass reloads; with the first actually being a light fireform load, and the 90 TNT being a field load; for purpose of fire & forget multifired 7.62x39 brass during field usage.
-The 95 VMAX and 107 SMK are hot loads, that in general are more target loads than game
-The 123 and 129 gr loads are workhorse game loads.
One curious thing about Grendel is for some reason point of impact of a 100 yard zero tends to be about the same 100 yard POI for whatever you shoot. It's weird. So they all were run with a 100 yard zero.
In the graph, the underline shows the range where load hits 1000 ft-lb of impact energy. So a 14.5" Grendel is hitting with 1000 ft-lb with most loads out to between 200 and 250 yards. That's pretty impressive for such a short barrel in a light frame AR15. For reference, .223 pretty much never hits that impact energy in a 16" barrel beyond right at the muzzle, and is already hitting the milder 800 ft-lbs impact energy threshold at about 100 yards with most loads. Cut an AR15 BBL down to 14.5 pin and weld, and it almost halves that distance even more, depending.
The green highlight zone are the beginning of transonic transition distance, where accuracy (and digital target tracking) can start to degrade. Out of a 14.5" BBL, this is a Hell of round.
For me, this also demonstrates why I just don't care for 130 gr bullets so much in Grendel. Or at least, not in this one. Once you go "too heavy" in Grendel, you start losing yardage to things like 1000 ft-lb impact distance, and subsonic transition zone. While neither of those are the End All Be All of Ballistics, they are common metrics used for decision making.
Since I went to the trouble of making this table from my own loads for my own usage, maybe others will benefit some as well.
I put this together to keep with my rifle, in MOA. And it took a bit of time to compile it, so here you go, others maybe can benefit as well.
-First two columns are actually 7.62x39 brass reloads; with the first actually being a light fireform load, and the 90 TNT being a field load; for purpose of fire & forget multifired 7.62x39 brass during field usage.
-The 95 VMAX and 107 SMK are hot loads, that in general are more target loads than game
-The 123 and 129 gr loads are workhorse game loads.
One curious thing about Grendel is for some reason point of impact of a 100 yard zero tends to be about the same 100 yard POI for whatever you shoot. It's weird. So they all were run with a 100 yard zero.
In the graph, the underline shows the range where load hits 1000 ft-lb of impact energy. So a 14.5" Grendel is hitting with 1000 ft-lb with most loads out to between 200 and 250 yards. That's pretty impressive for such a short barrel in a light frame AR15. For reference, .223 pretty much never hits that impact energy in a 16" barrel beyond right at the muzzle, and is already hitting the milder 800 ft-lbs impact energy threshold at about 100 yards with most loads. Cut an AR15 BBL down to 14.5 pin and weld, and it almost halves that distance even more, depending.
The green highlight zone are the beginning of transonic transition distance, where accuracy (and digital target tracking) can start to degrade. Out of a 14.5" BBL, this is a Hell of round.
For me, this also demonstrates why I just don't care for 130 gr bullets so much in Grendel. Or at least, not in this one. Once you go "too heavy" in Grendel, you start losing yardage to things like 1000 ft-lb impact distance, and subsonic transition zone. While neither of those are the End All Be All of Ballistics, they are common metrics used for decision making.
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