16” 308 Gas Gun Match Ammo Velocity and Groupings - Page 1

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16” 308 Gas Gun Match Ammo Velocity and Groupings

mcdougall53012

Joined Oct 2020
Posts 289
EE 100% (49)

GA, USA

Posted: 1/15/2024 6:04:27 PM EDT

[Last Edit: mcdougall53012]

Struggled to find popular 308 win Match loading velocities in a 16 inch gasser, so here’s a day’s worth of data collection.

Hornady 168 Amax Black: 2505 u / 2527 s
Federal GMM 168 SMK: 2425 u / 2425 s
FGMM 175 SMK: 2414 u / 2441 s
FGMM 185 Berger Jug: 2440 u / 2441 s
IMI 175 OTM: 2257 u / 2325 s

Federal Trophy Copper 165: 2555 u / 2564 s
Federal Trophy Bonded 165: 2604 u / 2606 s
Federal Fusion 150: 2659 u / 2675 s

Test gun:
16” Chrome Lined 308 1/10 LMT MWS
Chrono: Labradar
Atmospherics: 51* F, 243’ elevation, 29.5hg
Unsuppressed (u): Area 419 H Match Brake
Suppressed (s): KGM R30

5 shot groups taken 1-2 minutes apart with bolt locked to rear for cooling. 100 yards

Photos

Groupings conclusions:
Hornady 168 Amax grouped stellar with decent velocity and BC. Excellent choice for precision and hunting.

Federal Gold Medal Match:
168’s and 175’s grouped similar with an edge to 175’s. 185’s had excellent velocity and SD’s but lackluster groups.

Federal hunting: Trophy Bonded and Copper had great velocity but poor groupings out of this test gun. 150 fusion had slightly better performance suppressed.

Accuracy considerations: Chrome lined barrel, 4.5lbs trigger, and grouping fatigue
Unsuppressed groups were shot first followed by suppressed groupings.
All match loadings had an impressive sub MOA POI shift from any other match loading in this test.

Rubicon777 Joined Jun 2021 Posts 1039 EE 0% (0) AZ, USA	Posted: 1/15/2024 8:49:37 PM EDT [#1] Outstanding information thank you.

HomeAtLast Memberme Joined Mar 2004 Posts 8418 EE 100% (17) USA	Posted: 1/15/2024 9:01:38 PM EDT [#2] Those are decent velocities

TxLewis Wsbptkt Now, more than ever. Joined Mar 2001 Posts 55648 EE 100% (20) TX, USA	Posted: 1/15/2024 10:31:37 PM EDT [Last Edit: TxLewis] [#3] Thanks op
	In times of universal deceit, telling the truth is a revolutionary act. Orwell In the absence of orders, go kill something Evil. It's an act of faith , not reason. Have faith in God for life everlasting.

HighpowerRifleBrony Member Joined Dec 2013 Posts 21506 EE 0% (0) TX, USA	Posted: 1/16/2024 3:24:15 AM EDT [#4] Quote History Originally Posted By HomeAtLast: Those are decent velocities View Quote IMI should be ashamed of that 175gr.
	"Technique isn't something that can be taught. It's something you find on your own." - Bunta Fujiwara

HighpowerRifleBrony Member Joined Dec 2013 Posts 21507 EE 0% (0) TX, USA	Posted: 1/16/2024 3:25:46 AM EDT [#5] Hornady 168 Amax Black: 2505 u / 2527 s View Quote What does the U and S mean?
	"Technique isn't something that can be taught. It's something you find on your own." - Bunta Fujiwara

mcdougall53012 Joined Oct 2020 Posts 290 EE 100% (49) GA, USA	Posted: 1/16/2024 12:44:51 PM EDT [#6] Suppressed and unsuppressed

FL_Sportsman Member Joined Jun 2022 Posts 167 EE 100% (58) FL, USA	Posted: 1/18/2024 8:08:26 PM EDT [#7] Great post @mcdougall53012

Ghostface .40 S&W advocate Joined Mar 2001 Posts 10232 EE 100% (74) IN, USA	Posted: 1/23/2024 2:01:09 PM EDT [#8] Quote History Originally Posted By HighpowerRifleBrony: IMI should be ashamed of that 175gr. View Quote They should, that shit is atrocious at distance! Completely worthless at 800 and beyond ….
	It is a phenomenally dangerous thing when a governing entity is so completely vacant of basic intelligence

themcfarland Joined Nov 2008 Posts 830 EE 100% (15) LA, USA	Posted: 2/25/2024 10:37:48 PM EDT [#9] Thank you. I had guesstimated 2580 from my 16 . So I was a bit too high. This helps.

Finslayer83 What have the Romans ever done for us? Joined Jul 2008 Posts 40904 EE 100% (185) TN, USA	Posted: 3/13/2024 6:43:37 PM EDT [#10] I need to do this with the DD5V3. Just need to gather up the ammo and find where I stashed my magnetospeed.
	Panem et Circenses I have also learned from experience that the greater part of our happiness or misery depends upon our dispositions, and not upon our circumstances.

bfoosh06

Happy to be a Member

Joined Sep 2008
Posts 14917
EE 0% (0)

NT, USA

Posted: 3/21/2024 1:51:45 AM EDT

[Last Edit: bfoosh06] [#11]

@mcdougall53012

I just posted your link to the other coincidental current 16 and 20 inch chrono data in the Ammo forum one...
https://www.ar15.com/forums/ar-15/308-Velocity-data-for-several-AAC-loads-16-and-20-barrel/16-785602/?r=8644716&page=1&anc=8644716#i8644716

Note... he got the same low velocity from the IMI 175gr ....Do you happen to have the Lot # of your IMI 175gr ?

*Hold on to your AR-15s. Their magic must be very powerful, or they wouldn’t want them.*
JAFOM.... Just another fat old man.

________________________________

TOGC,IADC

Jus_Ad_Bellum Member Joined Dec 2002 Posts 4358 EE 100% (16) USA	Posted: 3/22/2024 4:09:09 PM EDT [#12] Just got a Garmin so I was able to confirm some velocities out of my 16" OBR 762 with Saker 7.62: Average, STD Dev. Black Hills Red Box 1 2510.4, 15.4 Federal Gold Medal Berger (185) 2412.9 , 11.7 Federal Gold Medal (168) 2376.1, 20.6 Federal Gold Medal (175) 2411.2 , 10.7 Hornday ELDX Hunter (178) 2419 , 10.2

16” 308 Gas Gun Match Ammo Velocity and Groupings

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