Range Report 308win. FGMM 175 True Velocity

[BrienM]

Can some of you all report the actual velocity lately of the 308win. Federal Gold Medal Match 175's along with barrel length and make (i.e. factory, Krieger, Rock, etc) of what you shot it in?
I am curious how close it is to what is printed on the box for different makes/lengths. Thanks
Brien

 

[tnichols]

2533 FPS out of a 20” AIAE MK III (Lothar Walther) Lot #P21E202

 

[BrienM]

Thanks for the info @tnichols

 

[softcock]

I ran them out rock 5r and 22" length . I was chrony. in under -2600 fps , like in area 2580 Vel. .
It Not fast at all, but Hovering just under 2600FPS and 175's fed.GM was a fucking hammer . You were definitely ' Dropping Them in' down range @ 1000 yrd. though, but accurately . That Vel. node is pretty solid .
.

 

[theLBC]

i don't have any radar, but i am using 2515 in my ballistic app and it seems spot on so far.
20" 1:12 FN CLCHF barrel (Scar 20S gas gun).

 

[BrienM]

I have a good load of Shooters world Precision (42.8ish) behind 175smk in Lapua brass at 2580 in a 26" douglas 10" twist. I was practicing some PRS stuff the other day shooting reloaded range pickup hornady brass. I ran the same powder charge in hornady brass but was 2550 (thinner brass I suspect) and shot one of my best groups ever 5 shots @ .180" .. Just got me thinking maybe i need to slow it down a little. I asked about the FGMM 175 velocity because it seems all other 308 ammo is judged off of it. I was going to buy a couple cases of it before the covid bologna hit. now it seems to have gone up a little so i bought a whole bunch of loose 175's.. So many calibers are so much better than the ole 308 but I get great satisfaction running my 308...
Thanks for all the numbers this evening fella's.. I appreciate the info!!!

 

[BrienM]

Did some shooting yesterday with a little experimentation. I weighed my hornady cases vs my lapua cases with lapua weighing 10+/- grs more than hornady. I added roughly half gr powder (it was practice day so i "threw" the powder charges through my Harrels powder measure) to the hornady cases and achieved nearly same velocity. May be useless info to some but that was my informal with out a scientific lab results.. your results may very.. (175smk with 43.2 grs got me 2640 in hornady cases and shot lights out)

 

[JA Thacker]

2589 fps with a 23in Bartlein 1-11.25 at 75*F and 820ft of elevation

 

[JA Thacker]

I ran them out rock 5r and 22" length . I was chrony. in under -2600 fps , like in area 2580 Vel. .
It Not fast at all, but Hovering just under 2600FPS and 175's fed.GM was a fucking hammer . You were definitely ' Dropping Them in' down range @ 1000 yrd. though, but accurately . That Vel. node is pretty solid .
.

That's probably close because I'm at 2589 with a 23" barrel.

 

[Blaster7Romeo]

I have 2532FPS as my trued velocity in AB for my 18inch LaRue with suppressor attached..

but I have not shot to check that in a whiiiileeeee

 

[regency]

2450ish out of a KAC SR25 16" barrel

 

[MK20]

I am at 2740 out of a 26" Criterion barrel at 2000 ft elevation. This seems kinda fast compared to some. Am I right?

 

[JA Thacker]

I am at 2740 out of a 26" Criterion barrel at 2000 ft elevation. This seems kinda fast compared to some. Am I right?

That's about what I get out of my R700 with a 26" and 168FGMM.

 

[eicas]

2550-ish seems to be a happy place with the 175smk all things being equal. Pushing it more beats things up more than you get back from it. My opinion only...

 

[StrayDog]

@2610 from a Goddard/Rock 1-10 22" and @ 2620 from an Impact/Bartlein 1-10 24", both with brakes.
I'm still shooting older lots in the old boxes, not sure about newer stuff.

 

[BrienM]

Thanks for the input fella's.

 

[Lunchbox27]

2670 from a 1:10, 26” Proof barrel with a can.

 

[BrienM]

2670 from a 1:10, 26” Proof barrel with a can.

does your can affect the temp stability of the load or have an effect while shooting throughout the day of cool in morning/ hot in afternoon more than shooting without?

 

[brianf]

I am at 2740 out of a 26" Criterion barrel at 2000 ft elevation. This seems kinda fast compared to some. Am I right?

Same here 2740 prob about 1500 ASL where i was shooting
24" Krieger 4 Groove 1:10 or 11 i forget

 

[Lunchbox27]

does your can affect the temp stability of the load or have an effect while shooting throughout the day of cool in morning/ hot in afternoon more than shooting without?

I have never noticed any effect between temps. I have shot in 50 degrees to 100 recently, between sea level and 700ft with no ill effects. I only shoot suppressed, so no answer for shooting without. I normally don’t shoot factory ammo, unless Im getting initial testing of a new barrel. My chrono numbers above were at 150 rounds on the barrel so its possible that it sped up.

I run a mild charge of 43.2 grains of 4064 with the 168 ELD @ 2750

 

[Hoyt7mm]

2670 out of a 26" Bartlein 5R in the winter months. I haven't gathered warm weather data yet.

 

[wade2big]

20” Remington 700 5R 2500fps
20” Tikka ctr 2530fps
20” sako TRG 2565 fps
26” sako trg pva barrel 2750fps

all sea level on the TexasGulf Coast

 

[db2000]

Savage APO .308 24” 10tw
Magnetospeed V3

55F 80% 29.7mmHg
Federal Factory Gold Medal SMK 175
COL 2.010
COAL 2.805

2643, 2670, 2658, 2647, 2662
2651, 2661, 2656, 2643, 2656 SD 8.9
0.6” group