Short and light weight upper for hunting 6.8spc/6.5grend/224valk?
- Thread starter z7.jled
- Start date
150fps less than a 22', 100fps less than a 20"
Straight from Hornady's website 24" barrel 2580fps, a 20" will be around 2480 and a 16 around 2380.
Test Barrel (24")
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Here are some numbers I copied from Vascar2’s post on 65grendel.com
A Friend and I chronographed a 16, 18, 20 and 24 inch barrels on the same day with a magnetto speed chronograph. Look at the difference between the 20 inch and 24 inch 6.5 Grendel barrels. The gain will be much less per inch over 24 inches due to the small 6.5 Grendel case capacity.
Here is a list of the tested ammo by average velocity for each barrel length.
120 Grain HP BT PPU
16" 2392
18" 2455
20" 2480
24" 2559
110 grain FMJ PPU
16" 2510
18" 2570
20" 2614
24" 2683
123 grain A-Max Hornady
16" 2419
18" 2464
20" 2505
24" 2568
123 Grain SST Hornady
16" 2430
18" 2493
20" 2511
24" 2583
Hand Load 123 Grain Nosler CC, 31.0 grains CFE223, CCI 450
16" 2449
18" 2471
20" 2526
24" 2619
100 Grain FMJ Wolf
16" 2507
18" 2571
20" 2615
24" 2695
Hand Load 107 Grain SMK 28.5 IMR8208XBR, CCI 41 Hornady cases.
20" 2658
24" 2729
Here is the difference between the 18? barrel compared to the shorter 16? barrel which was slower with every load.
120 grain PPU HP BT
63 FPS difference
110 grain PPU FMJ
60 FPS difference
123 grain A-Max
45 FPS difference
123 grain SST
63 FPS difference
Hand load 123 grain Nosler CC
27 FPS difference
Wolf 100 grain FMJ Steel cased
64 FPS difference
Difference between 20? and 18? barrel 6.5 Grendel
120 grain PPU HP BT
25 FPS difference
110 grain PPU FMJ
44 FPS
123 grain A-Max
41 FPS difference
123 grain SST
18 FPS
Hand load 123 grain Nosler CC
55 FPS difference
Wolf 100 grain FMJ Steel Cased
44 FPS difference
I have been very happy with my 6.8 on pigs, deer and coyotes, using Sierra 110 gr pro-hunters. Great round that seems to kill out of proportion to the recoil and blast, and easy to tote around!
My vote - 6.8 all the way ....ARP 16” unsuppressed or 12.5” suppressed. Eric at Blackstone Arms makes a nice upper.
Was happy with a 12.5" 6.8 on pigs but like a fool sold it when I got the wants for something else. Going to replace it with a Grendel next time around just because....
Another vote for 6.8. I love my 12.5" ARP barrel. I agree with fanninland above, 12.5" if you are gonna suppress, 16" if you aren't. It is a great hunting round for deer and smaller game. I have been shooting the 120 sst's. Factory hornady 120 sst's are going 2400 out of my 12.5" with suppressor. I haven't worked up a load for it yet, just been shooting the factory rounds. I think I can get to 2450, maybe 2500 with hand loads.
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