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Reloading using IMR-4064 for .308 Winchester

This is a discussion on Reloading using IMR-4064 for .308 Winchester within the Ammunition forums, part of the M14 M1A Forum category; I've been reloading for years and came up with the perfect load for shooting 1000 yard shooting. I haven't done a velocity test for some ...


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Old March 4th, 2013, 04:13 PM   #1
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Reloading using IMR-4064 for .308 Winchester

I've been reloading for years and came up with the perfect load for shooting 1000 yard shooting. I haven't done a velocity test for some time and my chronograph is M.I.A. Anyone know the velocity of this particular load:

Federal Brass (marked FC 08)
Federal 210M Primers
42 grains of IMR-4064
175 grain SMK
Seated for 2.800"

I can't remember what the velocity is and I have someone asking me what the velocity is so they can run a sierra ballistic report on how this will behave in their M40A1. (24 barrel 1-12" twist) Any help would be appreciated. I'm thinking the velocity was somewhere in the 2585-2590 fps range.

Thanks from jps
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Old March 4th, 2013, 05:31 PM   #2
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I am sorry that I can't give you speed quotes.

What I can tell you is that you have a very respectable load there.

I run 41.5 IMR4064, GGG brass, CCI34 primers 175SMK and seat to 2.825.

No pressure signs at all & the rifle eats it up. .75 inch average at 100 yds.

This is a smokin load in my M25 w/22 inch 1:11 twist.

I will chrono the next time out. I was so stoked with the performance I didn't even take any notes.

Everything I have hit at over 200 yards is dead. Quick dead. In the freezer dead.

I would not want someone putting that load on me at 800 yards.

Ole Silver

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Old March 4th, 2013, 05:40 PM   #3
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Wow -- with the exception of the powder amount, that's my 1000yd load as well. I have no idea what the velocity is, just keep stuffing 4064 into it until it stays supersonic. Shoots great.

-- Dan

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Old March 4th, 2013, 06:00 PM   #4
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Quote:
Originally Posted by danharris View Post
Wow -- with the exception of the powder amount, that's my 1000yd load as well. I have no idea what the velocity is, just keep stuffing 4064 into it until it stays supersonic. Shoots great.

-- Dan
So how do you know it's still supersonic if you don't know how fast it's going?

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Old March 4th, 2013, 06:12 PM   #5
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So how do you know it's still supersonic if you don't know how fast it's going?
He is the new six million dollar man.

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Old March 4th, 2013, 06:19 PM   #6
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Pretty mild load according to Hodgdon's reloading tables. For the 175gr SMK, they show 41.5gr of IMR 4064 at 2500 fps up to 45.6gr at 2728 fps using Fed 210M primers in Win cases. Their load data is HERE.

Thanks from dwight55
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Old March 4th, 2013, 07:52 PM   #7
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Using IMR 4064 at 42.2 in FC08 brass 175gr SMK 210M gives me an average
of 2600 fps out of a standard 22" barrel M1A........
This load should be making it to the 1000 yard line and past.

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Old March 4th, 2013, 08:01 PM   #8
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Quote:
Originally Posted by TexIndian View Post
Pretty mild load according to Hodgdon's reloading tables. For the 175gr SMK, they show 41.5gr of IMR 4064 at 2500 fps up to 45.6gr at 2728 fps using Fed 210M primers in Win cases. Their load data is HERE.
Woo-hoo, . . . thanks guys, . . . just finished up cleaning 400 odd cases, . . . got 200 primed, . . . other 200 sized, deprimed, etc.

Picked up some 4064 couple weeks ago for an AR, . . . might just have to give a go at the .308 and see how it handles it.

May God bless,
Dwight

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Old March 4th, 2013, 11:36 PM   #9
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Quote:
Originally Posted by Nomad View Post
Using IMR 4064 at 42.2 in FC08 brass 175gr SMK 210M gives me an average
of 2600 fps out of a standard 22" barrel M1A........
This load should be making it to the 1000 yard line and past.
Well that's pretty much the powder charge I plan on using with 180gr SGK in my Loaded. You don't have any pressure issues?

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Old March 5th, 2013, 08:55 AM   #10
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My load too.

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Old March 5th, 2013, 09:06 AM   #11
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Quote:
Originally Posted by TexIndian View Post
Pretty mild load according to Hodgdon's reloading tables. For the 175gr SMK, they show 41.5gr of IMR 4064 at 2500 fps up to 45.6gr at 2728 fps using Fed 210M primers in Win cases. Their load data is HERE.
My GGG brass does not have the volume capacity of the Win brass. I am also using CCI#34's.

I did chrono at one point in the past & if my memory serves me well, it was close to 2600. All I can tell you is that is a sweet spot for that rifle.

I'm going to the range next week. I will chrono again and post results.

Info added------ I just dug through my notes and found chrono data for that load when I did a piston test. Only difference was Fed GM210M primers.

My avg V was 2585. Total of 60 rounds fired.

Ole Silver


Last edited by Ole Silver; March 5th, 2013 at 09:18 AM.
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Old March 5th, 2013, 12:08 PM   #12
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Quote:
Originally Posted by TexIndian View Post
Pretty mild load according to Hodgdon's reloading tables. For the 175gr SMK, they show 41.5gr of IMR 4064 at 2500 fps up to 45.6gr at 2728 fps using Fed 210M primers in Win cases. Their load data is HERE.
I looked at their website for loads and I think they are using civilian brass for those numbers. When I use the FC 08 (Federal Brass) or Lake City Brass, I get more velocity from a lesser amount of powder. It's looking like I am just going to have to try to scrape the money togther to buy another chronograph.

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Old March 8th, 2013, 01:46 AM   #13
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Here is the earlier load data from IMR when they first switched from copper crusher CUP to transducer PSI pressure measurements. (It's not the complete list but it was a short list to begin with.)

http://www.imrpowder.com/data/rifle/308win.php

Here is the later load data from IMR dated 2005.

http://www.imrpowder.com/data/rifle/...-2005apr03.php


Last edited by John Coleman; March 8th, 2013 at 02:00 AM.
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Old March 8th, 2013, 04:05 AM   #14
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Quote:
Originally Posted by moonskin1976 View Post
I've been reloading for years and came up with the perfect load for shooting 1000 yard shooting. I haven't done a velocity test for some time and my chronograph is M.I.A. Anyone know the velocity of this particular load:

Federal Brass (marked FC 08)
Federal 210M Primers
42 grains of IMR-4064
175 grain SMK
Seated for 2.800"

I can't remember what the velocity is and I have someone asking me what the velocity is so they can run a sierra ballistic report on how this will behave in their M40A1. (24 barrel 1-12" twist) Any help would be appreciated. I'm thinking the velocity was somewhere in the 2585-2590 fps range.
I use 41.8 of 4064 which is the military loading .My M14 clocks at 2600. I have used this load in the sandbox with a DMR and M40 and it will perform at 1000. IMO the best long range powder and load for 7.62 in all conditions.The load stated above that you are using is as good as it gets for the M14.If you are using match primers especially make sure seated to .007 deep

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Old March 8th, 2013, 04:30 AM   #15
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While I believe there may be some even hotter loads using 4064, it does not then match the pressure curve timing relative to the critical M1A gas port location, and so it may result in a "too issue No. 3, I believe) that somewhat exceeds this load at about 2850 fps, but that will "redact" your op-rod in all likelihood.


RAMMAC, you have a comment on this?

Also, btw, 4064 is one of those earlier design IMR powders that goes through my RCBS measure somewhat like logs through a chipper! Crunch, crunh! Nowhere near as easy to meter as, say, AA 2520, (The "Palma Powder" as the experts say, it being especially designed for the .308/7.62 @ mil-spec service rifle loadings.)

It meters like quicksilver and is an excellent powder for the 7.62! My load (I don't remember it offhand right now, but it's around ≈ 43 gr*...and I do use CCI#34 primers and LC mil-surp brass.)

It quietly launches a Sierra 155 gr bullet @ 2700 fps, and puts all 5 of those bullets into a 0.8" group @ 100m. So far, my longest recorded shot was three shots and three hits into 3.76" @ 390 m. All in an approx. 15 - 25 mph gusty cross wind and using a somewhat lower powered scope (A Leupold 2 - 7X). Quite OK I think!

Soon I'll be re-locating my Mk4 Leupold with it's TMR reticle. It's a 6-20 X 50mm scope (I believe...) with Ballistic Comp dials. Should be better for ultra-long range stuff than my existing 2 - 7X compact. Oh yeah; it's also a First Focal Plane reticle with Leupold's proprietary Tactical Milling Reticle ranging scope. With that combo on my M1A and with it's Harris 'pod, I should be able to keep the heads of gov'mint altercants at bay at the least well beyond 800m!

But remember now: save out some of your ammo for that day this summer, when it's too humid, too hot and too damned disgusting for the have-nots and the wanna=bes, all promised by our POTUS for it to be "all bettah!"

Yup: You'll see. All Bettah!

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