.308 w/ IMR 4064 and 175 SMK

M

Mattrmvpd

Gunny Sergeant
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Minuteman
Sep 30, 2004
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South Georgia
#1
Hey guys... I was wondering what charge you all are using with the IMR 4064 and 175 SMK's

I have been exclusively using RELOADER 15 at 43 grns... but due to the shortage... I came across IMR 4064 and going to give it a shot.

Let me know what you are using and how well it shoots.

Thanks,
Matt (LEO SOUTH GA.)
 
#2
My load was 42.4 grains loaded to approximately 2.285" and it was accurate at 100 yards with a 24" barrel. When I chorono'd it, the extreme spread was nearly 100 FPS. It was early in my handloading, so my experience was low and I may have been doing something to affect it and not know it, but that is a lot of variance for me. That kind of variance won't show much at 100, but will definitely show at longer ranges.
 
#5
From another thread on 4064. The poster has discovered the data for Federal Gold Medal Match.
2agupydy.jpg
 
#6
43.3gr in LC13 brass, with Tula primers is a *touch* too much in a friends SSG3000, though it shoots beautifully there. Average MV is 2695fps, measured via magnetospeed.
 
#7
Mattrmvpd said:
Hey guys... I was wondering what charge you all are using with the IMR 4064 and 175 SMK's

I have been exclusively using RELOADER 15 at 43 grns... but due to the shortage... I came across IMR 4064 and going to give it a shot.

Let me know what you are using and how well it shoots.

Thanks,
Matt (LEO SOUTH GA.)
Click to expand...

42.5 4064 should be about the same as 43 RL15
 
#9
42.7 grains topped off with a 178 BHP (moly) ai 2.813 COAL in Hornady brass gives me 2566 fps from a 18 inch AR-10T. It also gives me a woddy everytime I shoot these loads.
 
#21
AIAE MKIII 308
24" Lothar Walther 1/12 twist

175g SMK
Win Brass
OAL 2.820
210m primer
IMR 4064

Did an OCW and found a low node at 42.3 and a high node at 43.2.
42.3@ 2625fps
43.2@ 2710fps
 
#23
I don't shoot 175 SMK any more, but have switched to 178gr Amax instead. Load data pretty much remained the same, though.

I found 2 nodes for my 20" barrel with Lapua brass. 42gr 4064 at 2.845" COL = 2500fps. Very accurate but not quite fast enough for 1000 yards. Found the next faster node at 43.8 grains = 2600fps. Just as accurate as the slower node.
 
Last edited:
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#24
42.2 grains 4064, LC LR 07 brass trimmed to 2.10, 175 nosler cc,Fiocchi LR primer, loaded to 2.810. This load shoots 1 hole at 100 and best 3 shot at 200 was under half inch shooting off bags. That's out of remington 700 sps tactical on a B&C medalist stock stock everything else..
 
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#27
I tried posting a completely new post with my setup, but for some reason it hasn't actually hit the boards yet. Here is the the load test we developed using 175gr SMK's, IMR 4064, once fired Hornady brass, and Remington primers. Shooting out of my Surgeon 591 SA with 22" Bartlein barrel 5R 1:11RH. All shot at 50yds.

and what we decided on was 43.1grains. Pretty sure I pulled the 42.5gr grouping.


We took it out to 800m and 1000m yesterday. Fairly pleased with the results.



Saw a 3" spread at 800m.


With a 4" spread at 1000m.
 
#28
2clicks said:
What Emilio said I'm abig fan of it

41.7 IMR4064
L/C Brass
Winchester primer
2.800 OAL

26" Remington 700P 2620 fps
Click to expand...

This is interesting, I'm trying to come up with a load for my Rem 700 SPS-V 26" and shot 41.8 IMR 4064, LC LR brass, CCI200 primer, 2.800 OAL and got an average 2547 FPS.

Thumper580 said:
41.7gr of 4064 w/175 is about 2625fps and stays supersonic to 1000yards. In a FC case.
Click to expand...

Shooting 41.7 IMR 4064, FC brass, F210M, 2.800 OAL my average of 5 was 2584 FPS with the same rifle.

Both using 175 SMK's and the temp was 58 degrees.
 
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#33
davebl said:
Here are some OCW targets I shot from an 18" JP gas gun:

HDWxgTS.jpg
Click to expand...

Very Interesting!

As the powder charge increases, the point of impact decreases?

45.8 is hitting at what looks to be 1" lower than 41.5, that is some weird stuff that a load which is 4.3 grains hotter is impacting that much lower?

Those charge weights versus points of impact are the about the exact opposite of what I would expect to see.
 
#34
LRShooter101 said:
Very Interesting!

As the powder charge increases, the point of impact decreases?

45.8 is hitting at what looks to be 1" lower than 41.5, that is some weird stuff that a load which is 4.3 grains hotter is impacting that much lower?

Those charge weights versus points of impact are the about the exact opposite of what I would expect to see.
Click to expand...

Yep. I'm assuming that its due to barrel harmonics.
 
#35
I don't want to hijack this thread but didn't feel like starting a new thread about the same powder and bullets. I did an OCW test using 41.4 to 43 grains of 4064 in .2 grain increments. I seems that my nodes are at 41.6 and 43+ grains since my group is getting closer together at 43 but I didn't test anything higher. However, I'm starting to see some pressure signs at 43 grains, with a slightly flattened primer and just slightly more force required on the bolt lift. I want to try 43.2 to see if my groups get any smaller. Do you think it safe to do so? Could I get more velocity without the pressure signs if I switch brass? I'm only using federal since I have a couple of hundred from shooting FGMM

Federal brass
SMK 175
WLR primers
2.820 COAL
 
#37
I ve been over 44.2 with no issue, in my rifle with 175 smk and lapua brass. I will say this, find a node and explore seating depth, get a chamber gauge if you don't have one.

rockbox said:
I don't want to hijack this thread but didn't feel like starting a new thread about the same powder and bullets. I did an OCW test using 41.4 to 43 grains of 4064 in .2 grain increments. I seems that my nodes are at 41.6 and 43+ grains since my group is getting closer together at 43 but I didn't test anything higher. However, I'm starting to see some pressure signs at 43 grains, with a slightly flattened primer and just slightly more force required on the bolt lift. I want to try 43.2 to see if my groups get any smaller. Do you think it safe to do so? Could I get more velocity without the pressure signs if I switch brass? I'm only using federal since I have a couple of hundred from shooting FGMM

Federal brass
SMK 175
WLR primers
2.820 COAL
Click to expand...
 
#38
My IMR 4064 Load for .308 Win

I've been using the load below with my .308...24" Heavy Barrel...1/10 Twist...and getting .5 MOA to Sub .5 MOA Groups...all 3 rounds touching at 100 yards. I hit a 4" steel plate at 1000 yards using this load.

IMR 4064 - 42.8gr
Once Shot, Fire-Formed, but Re-Neck Sized Brass, OAL - 2.010 (Remington Premier Gold Match Brass)
CCI Large Rifle Primers #200
Berger Long Range Target BT 175gr BC: G1 - .515, G7 - .264
COAL - 2.840
Muzzle Velocity - Avg. 2,675 fps

photo.JPG
 
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#40
Lapua brass, 175 SMK, 42.2 grains IMR 4064. Seating depth is 2.795. Primer is Fed 210m.

LC LR brass, 175 SMK, 41.0 grains IMR 4064. Seating depth is 2.795. Primer is Fed 210m.

These are my standard loads. I have more than one 7.62x51 rifle, they all shoot this ammo.

The LR cases are about 5 grains heavier than the Lapuas. With the charges above, they shoot into the same holes. I sort cases by weight; all the cases in a box of ammo are: Maximum weight - minimum weight = 1.0 grain or less.

The attached photo is a 6-inch plate shot at 500 meters from a bipod and rear bag. I fired 15 times and hit it 11 times - I am kind of new to this whole bipod thing.
 

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#42
biner626 said:
From another thread on 4064. The poster has discovered the data for Federal Gold Medal Match.
2agupydy.jpg
Click to expand...

Very interesting.

Has anyone in here ever pulled one of these factory cartridges and weighed powder? I did two of same lot (# P21N553) and recorded 43.74 to 43.76 (my scale runs by 0.02 grain).
fedgmm175.jpg



I am curious to know what others found powder weight at.
 
#44
Tristian19 said:
Very interesting.

Has anyone in here ever pulled one of these factory cartridges and weighed powder? I did two of same lot (# P21N553) and recorded 43.74 to 43.76 (my scale runs by 0.02 grain).
fedgmm175.jpg



I am curious to know what others found powder weight at.
Click to expand...
Yes Dan Newberry. Look for the Thread. Sleuthing Gold Metal Match or something like that. It has all the info on there
 
#47
shot these 2 steels yesterday, prone 600 yds, bipod, rearbag...this load also shoots ragged holes @ 100...i was too lazy to do load work up so i just copied the load data from the data sheet Dan Newberry posted and took it out and shot it.

175 SMK factory 2nds
41.7 gr 4064 (same dope as Fed GMM in my rifle)
Federal Brass
COAL 2.810"
2550 fps out of my 18" CBI barrel

image-9.jpg


engaged target with 2 rnds
image-7.jpg


changed to another target and put 2 more rnds on another steel
image-8.jpg
 
#48
Mattrmvpd said:
Hey guys... I was wondering what charge you all are using with the IMR 4064 and 175 SMK's

I have been exclusively using RELOADER 15 at 43 grns... but due to the shortage... I came across IMR 4064 and going to give it a shot.

Let me know what you are using and how well it shoots.

Thanks,
Matt (LEO SOUTH GA.)
Click to expand...

Man, just the opposite here, I just picked up an 8# IMR4064 because I can't find RELOADER 15. I think they should be close though.

Cheers,

George
 
#50
davebl said:
Yep. I'm assuming that its due to barrel harmonics.
Click to expand...
Davebl, could it have something to do with the fact that the bullet crosses the scope line of sight twice? If you are zeroed at 100 and the bullet path is coming up to POA from below, and you increase the velocity, could it impact lower? I usually do load dev at 380 so the bullet is falling...higher velocities mean higher POI, but at 100 it would be pre-apex right? does that matter?
 
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