Alexander Arms 6.5mm Grendel 129gr SST Ammo Ballistics
Brass Case • SST
Alexander Arms 6.5mm Grendel 129gr SST Ammo Ballistics
Brass Case • SST
Trajectory @ 100yd Zero
| Range | Velocity | Energy | Drop |
|---|---|---|---|
| Muzzle | 2238 fps | 1435 ft-lb | — |
| 25 yds | 2195 fps | 1381 ft-lb | -0.4" |
| 50 yds | 2154 fps | 1330 ft-lb | +0.2" |
| 75 yds | 2113 fps | 1279 ft-lb | +0.3" |
| 100 yds ⊕ | 2073 fps | 1231 ft-lb | +0.0" |
| 125 yds | 2033 fps | 1184 ft-lb | -0.8" |
| 150 yds | 1993 fps | 1138 ft-lb | -2.2" |
| 175 yds | 1954 fps | 1094 ft-lb | -4.1" |
| 200 yds | 1915 fps | 1051 ft-lb | -6.6" |
| 225 yds | 1877 fps | 1010 ft-lb | -9.7" |
| 250 yds | 1840 fps | 970 ft-lb | -13.4" |
| 275 yds | 1803 fps | 931 ft-lb | -17.7" |
| 300 yds | 1766 fps | 894 ft-lb | -22.7" |
| 325 yds | 1730 fps | 858 ft-lb | -28.4" |
| 350 yds | 1695 fps | 823 ft-lb | -34.8" |
| 375 yds | 1660 fps | 789 ft-lb | -42.0" |
| 400 yds | 1626 fps | 757 ft-lb | -50.0" |
| 425 yds | 1592 fps | 726 ft-lb | -58.7" |
| 450 yds | 1559 fps | 696 ft-lb | -68.4" |
| 475 yds | 1527 fps | 668 ft-lb | -78.9" |
| 500 yds | 1495 fps | 640 ft-lb | -90.4" |
Product Overview
The Alexander Arms 129-grain SST load pushes Hornady's Super Shock Tip bullet at 2,238 fps from a standard-length barrel, generating 1,435 ft-lbs of muzzle energy. The heavier 129-grain weight sits above the more common 120-123 grain class found in most 6.5 Grendel ammunition. With a G1 ballistic coefficient of 0.485, this round maintains velocity well at extended ranges while the polymer tip initiates reliable expansion on medium game.
What sets this load apart is the combination of Alexander Arms' expertise in the Grendel cartridge—they invented it—with Hornady's proven SST projectile. The SST features a secant ogive profile and an InterLock ring that mechanically locks the jacket to the core during expansion. This prevents the fragmentation that can occur with thinner-jacketed bullets on larger game. The heavier bullet weight also provides more retained energy at distance compared to lighter varmint-style options.
This ammunition works best for deer-sized game out to 300 yards and smaller game like hogs at closer ranges. The controlled expansion makes it effective for shots through the shoulder where lighter bullets might break apart. Hunters running 6.5 Grendel AR-15s for whitetail, mule deer, or wild boar will find this load delivers terminal performance that matches the cartridge's reputation as an efficient medium-game round.
- The 129-grain weight delivers more retained energy at 200+ yards than lighter 120-grain options, making it effective on deer-sized game at extended ranges
- Hornady's SST bullet uses an InterLock ring that keeps the jacket bonded to the core during expansion, reducing the chance of bullet fragmentation on bone
- Alexander Arms developed the 6.5 Grendel cartridge, so their ammunition is optimized for the platform rather than adapted from other calibers
- The polymer tip ensures reliable expansion even at lower velocities encountered at longer distances where hollow points may fail to open
- At 2,238 fps muzzle velocity, this load runs about 200 fps slower than some 123-grain competition loads, resulting in more drop at distance
- The hunting-specific SST design costs more per round than FMJ practice ammunition, making it expensive for zeroing and load development
- The heavier bullet may not stabilize properly in barrels with slower twist rates designed for lighter projectiles
- Expansion design means this round is not suitable for target shooting or competition where FMJ or match bullets are required
All Alexander Arms 6.5mm Grendel 129gr SST Ammo Prices
| DEALER | QTY | PRICE | SHIPPING | TOTAL | PRICE/RD |
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