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1000 yard loads

This is a discussion on 1000 yard loads within the Ammunition forums, part of the M14 M1A Forum category; Does anyone have a good load for taking the M1a out to 1000 yards? My rifle doesn't seem to like 175 grain SMKs very much. ...


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Old October 24th, 2011, 04:18 PM   #1
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1000 yard loads

Does anyone have a good load for taking the M1a out to 1000 yards? My rifle doesn't seem to like 175 grain SMKs very much. I haven't tried 155s but and worried about seating depth and magazine fit.

I'm going to try 41.5 gr IMR 4895 behind a 175 SMK at 2.800, but that hasn't worked well in the past. It also seems a little on the hot side.

The rifle in question is a SAI NM model with 22" barrel.

Also, I've never shot that far with before and if anyone is a member of Quantico shooting club, I'd love to get some pointers. Or just a walkaround since I just got my membership card but have never been. Thanks.

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Old October 24th, 2011, 05:17 PM   #2
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The only "clone" load I have done with a long range bullet in my SA M1A was supposed to be the load used for the newer loading of M118LR. It was 41.7g IMR4064. According to several web sites, including this one, Reloader 15 was once used for the M118LR but they changed to IMR4064. 1000 yards is stretching the limits of the M1A a bit. You can get there, but with a 175g SMK at sea-level, 70 degrees, and 35% humidity you will have to have 2600fps to remain supersonic at 1000. A 168 SMK will also get you to 1000 with a MV of 2600.

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Old October 24th, 2011, 05:28 PM   #3
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I'm sitting on 1000 rounds of M118LR. Unfortunately my rifle hates it so I'm not trying to duplicate that load.

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Old October 24th, 2011, 06:26 PM   #4
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Would be interested how much powder is in those. The reason I say that is I don't think 41.7g of IMR4064 will get the 175 SMK to 2700fps in a 22" barreled M1A.

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Old October 24th, 2011, 06:37 PM   #5
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One of the best 1000 yard bullets for the M1A was the OLD 180 gr Sierra Matchking.
The currently made 180 MK will NOT do.

You might try the 180 Sierra GAMEKING, last time I checked it still had the older design with the longer boat tail.

For 1000 yard NRA Match shooting you coluld also try seating the Sierra 175gr farther out past magazine length, as you only load one at a time.

The Sierra 175 MK was specifically designed to allow a 308 with a 22" barrel, to stay supersonic to 1000.

If you are not shooting in some sort of competition and do not HAVE to be able to go to 1000 yards try some Federal Match, or reloads with the 168gr Matchkings.
They will generally stay supersonic in an M1 A to 850 or 900 yards.

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Old October 24th, 2011, 11:15 PM   #6
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Those Lapua Scenar 155grs have a higher BC than the 175s and more velocity. Also the new Berger 175gr Tactical bullets were designed for use in mag-fed guns. They will go sub-sonic around 850 yds but according to the chief ballistician at Berger, they will maintain accuracy even after that happens (a rarity). Their test rounds shot under 1 MOA at 1,000 yds. Both of these bullets are expensive. In a month or two I will be able to give my personal test results but I haven't got that far with them yet. I've got 5 guns I'm testing them in.

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Old October 24th, 2011, 11:41 PM   #7
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Quote:
Originally Posted by TexIndian View Post
Those Lapua Scenar 155grs have a higher BC than the 175s and more velocity. Also the new Berger 175gr Tactical bullets were designed for use in mag-fed guns. They will go sub-sonic around 850 yds but according to the chief ballistician at Berger, they will maintain accuracy even after that happens (a rarity). Their test rounds shot under 1 MOA at 1,000 yds. Both of these bullets are expensive. In a month or two I will be able to give my personal test results but I haven't got that far with them yet. I've got 5 guns I'm testing them in.
I have never known of a bullet that goes subsonic before it hits the target to be "accurate"...

Keep us posted.

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Old October 24th, 2011, 11:52 PM   #8
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With the 308, 1000 yards takes ammo above and beyond...
One of the most accurate 308 factory rounds is the Federal 168gr Match ammo.

Out of a 24" barreled bolt rifle it will stay supersonic to 1000 yards on SOME days, but not on MOST.
Case in point, one day early in the morning I was shooting at 1000 yards, and I, the gun/ammo [Federal 168gr Match], was shooting great.

The very next morning, same gun same lot of ammo, I was shooting a verticle dispersion of @ 4 feet, with many of the bullets hitting sideways at 1000 yards.

Both signs of the bullet going subsonic. I have never had 168gr Federal Match go subsonic to 850 yards even in 18" 308's...

Military Match M118, the old 172gr FMJ bullet, has never shot as good from 100 to 800 yards, as 168gr Federal Match.

But it always shoots better at 900 and 1000 yards. I have NEVER had it go subsonic.

With a 308, 1000 yard accurating shooting, is a whole new World, with all new rules...

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Old October 25th, 2011, 12:28 AM   #9
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Of course you can make the 168 punch thru 1000yds of heavy moist air just push it about 2800fps thru your M1A if you want your rifle too live a happy life I would look for a better way.

175 Sierra or the 178 A-max, 42grs of IMR4064 in USGI spec brass coal 2.83 and the rest of the case prep you have down pat, or you can run with 41.5gr Varget, both loads are starting too get stiff. You didn't say what primer you use I use std Winchester, I have tried a small sample of the Wolf large magnums and I liked them alot.

1000yd matchs are fired slow prone so there is some play area for COAL, I think you could get as long as 2.85 and still be safe not touch the lands any longer and you will need too measure the throat, there is also the Berger line, there 175 has some good BC numbers as well, there just too pricey for my wallet and I couldn't get them too fly right even at 600yds this was there vld not there newest design.

Comercial case add a extra grain of powder.

And contrary too what some beleave the 168@2600fps falls on its butt long before 1000yds. for ATC its a sweet load.

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Old October 25th, 2011, 12:44 AM   #10
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What is sometimes not known by "normal" people is that most Military shooters that shoot the m14 at 1000 yards have a "Special" 1000 yard M14.

The front sight blade is lower, so they do not have the rear apperature up very high.

They sometimes have a smaller barrel port, they have a modified gas piston. They have a long throated barrel, and they shoot HOT loads...

They do not care how long the rifle lasts, before it has to be rebuilt, or replaced...

The bullet is seated out long, and they use a LOT of powder like IMR 4064, Varget, RL15 etc.

Think of it like this, you have a regular M 1A, and a regular, Chevy, Ford, Dodge or Toyota.

A nascar driver has a NASCAR Chevy, Ford, Dodge or Toyota. They just hope it lasts ONE race... Then it can be rebuilt or replaced...

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Old October 25th, 2011, 04:38 AM   #11
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I'm using Federal GM210M primers with Federal brass. I know it's not the best for the M1a, but I have about 1500 rounds of once fired federal from my rifles so I figure might as well.

I use IMR 4895 but will order some 4064. It's not convenient for me to get powder where I live.

I will try some factory GMM 175gr and for some reason American Eagle 168 OTM runs quite hot at 2650+ out of my rifle, I'll give that a try as well.

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Old October 25th, 2011, 04:10 PM   #12
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I have been loading lithuanian GGG brass with 40.5g of IMR 4895 and 175g smk with a win primer and has been doing good at steel (2moa) @ 1k. I dont hit it 100% of the time but manage enough hits for a big ass smile! I need to chrony it and shoot at paper to see how good it/me really do.

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