Official Grendel SBR/Pistol Velocity Thread

[Arkhangel5]

Only a little data so far.

Monster 12in pistol build. Just flash hider, no muzzle brake.

All shots so far with virgin Lapua brass, CCI BR-4 primer, IMR8208. All readings measured with Labradar. Temps 70-80

28gr 8208 under 123ELD - 2230fps. This load does 2465fps in my 18in match rifle.

28gr 8208 under Nosler 120 BT = 2230fps

Factory 123SST = 2280fps. 2490fps in match rifle

[MarkS]

12" PSA Upper
AAC 762-SDN
Starline Brass
CCI 400 primers
MagnetoSpeed V3 Chronograph

95gr VMax
30.0 gr Benchmark
2456 fps
SD 5
ES 9

123gr SST
28.0 gr Benchmark
2254 fps
SD 9
ES 16

Factory Hornady Black
123 ELD-M
2249 fps
SD 14
ES 31

There is no noticeable POI shift for my handloaded 123gr SST and the Hornady Black 123gr ELD-M.

[StoneHendge]

MarkS, good to see another fan of Benchmark. I'm really looking forward to trying it with the 90 gr Varmageddons when they finally hit the shelves.

12.5" BHW 264 LBC
107 gr SMK, GM205M

29.0 gr Benchmark (Hodgdon max) CM drop (no double weighing) 2440 with 5 shot SD of 7.

28.9 gr XBR (Hodgdon max is 29.8) 2473 with SD of 15. Notable ejector marks and the last time I'm ever going to bother with XBR in a Grendel case. I haven't ever gotten close to max with 3 barrels from 3 different manufacturers (BHW, JP, Satern)

[MarkS]

Hmmm. I recently purchased some 8208XBR, but have yet to load anything with it. TBH, I'm pretty satisfied with my Benchmark loads, and I've been trying to work up quieter 300BLK subsonic loads recently, so I am not overly motivated to experiment with the XBR just yet.

[jhidek]

Lilja 11.5 (11") suppressed

Hornady AG 2251fps @ 39*

[patrick021]

[VASCAR2]

https://www.precisionfirearms.com/48m8/barrels.html

https://craddockprecision.com/ar15-barrels/

https://sixsigmaarms.com/products.php?d=61

https://www.sixfiveoutfitters.com/

[biodsl]

The Six Five Outfitters Monster barrels are a screaming buy. You'll pay for the extra .5 moa of the others.

Here's a link to Rebby's (Six Sigma) site. https://sixsigmaarms.com/products.php?d=61 He sells a 12.5". I own one of his 16" 6mm ARC barrels. It shoots.