more energy option for ar-15 platform??

[Fordnandez]

From Ballistic AE.
24" grendel sst123 muzzle 2591fps energy 1833
100 yards 2424fps. energy 1609

12.5"grendel SST123. muzzle 2210fps. energy 1334
100 yards. 2061fps. energy 1160

24" has almost 40% more energy at 100 yards

12.5" grendel is just about the same as a 16" 300 blk .

Interesting info for sure, I wouldn't have thought it would be that large of a percentage. With that said 1160 is not bad knockdown power and if combined with a well placed shot you shouldnt have an issue.

[sir shovelhands]

From Ballistic AE.
24" grendel sst123 muzzle 2591fps energy 1833
100 yards 2424fps. energy 1609

12.5"grendel SST123. muzzle 2210fps. energy 1334
100 yards. 2061fps. energy 1160

24" has almost 40% more energy at 100 yards

12.5" grendel is just about the same as a 16" 300 blk .

A 400 fps drop for 12" aint bad at all.

As for it being similar to the 300 blk, at the muzzle sure, but with it's high BC, you'll stay above the expansion velocity threshold (1500 fps) for 123 ssts out to 500 yards while retaining the same energy as a 357 mag at the muzzle.

[sir shovelhands]

For comparison, a 110 grain tsx from a 16" 300 blk at 2300 fps will get you to 375 yards before dropping below the expansion velocity threshold (1300 fps) with a good bit less power than a 357 mag at the muzzle.