Factory 5.56 Hornady 73 ELD M too hot?

232593

232593

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May 25, 2022
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#1
About 5 years ago I bought a bunch of Hornady 5.56 73 grain ELD M ammo. It shot under an MOA in the Stag Varminter with the 5.56 chambered 24” 1:8 barrel.
IMG_5728.jpeg


I didn’t see any of the usual pressure signs so I bought a shitload more.

I took it out recently and tested it again with a different rifle with Krieger 1:7 24” barrel, 5.56 chamber.
Screenshot 2024-07-15 at 11.21.59.jpeg


It grouped about the same as before. No flattened or cratered primers.

Is this ammo too hot? Am I prematurely wearing out components?
 
#2
I have had this issue with Hornady TAP ammo. Blew every primer in every rifle I shot it in.
Hornady dismissed it with an “Oh in your CUSTOM rifle..”

They took no responsibility and seemed unaware of their liability.
 
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#3
RTH1800 said:
I have had this issue with Hornady TAP ammo. Blew every primer in every rifle I shot it in.
Hornady dismissed it with an “Oh in your CUSTOM rifle..”

They took no responsibility and seemed unaware of their liability.
Click to expand...
I never had any blown or even flattened primers with this ammo.
 
#11
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#15
Ahh superformance that makes a lot more sense. Yea that's still a little fast but if you're not getting ejector swipes, case head swell, flat/pierced priemrs, etc... I wouldn't be incredibly freaked out for being 100fps fast.
 
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#18
Over my pay grade. I can't say that it will never run again, but it is currently obsoleted in our system. We've drug up and un-obsoleted things before, though. I wouldn't hold your breath.
 
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#20
I attempted to duplicate that load with Ramshot TAC, nickel plated black LC brass, and FED205MAR primers.

This is what I got.
IMG_5734.jpeg


I never measured expansion at the base. I do however have a primer pocket expansion gauge. After two firings and annealings the primer pockets were still tight.
 
#21
Ledzep said:
Ahh superformance that makes a lot more sense. Yea that's still a little fast but if you're not getting ejector swipes, case head swell, flat/pierced priemrs, etc... I wouldn't be incredibly freaked out for being 100fps fast.
Click to expand...
What is the minimum velocity that bullets needs to fragment?
 
#26
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#27
232593 said:
Thats a badass optic you got there. NICE!!!

What does the base of the fired case look like on that Stand 1?

Out of a 24” with 1:7 I get about 2960ish with the IMI Razor Core. How am I getting that much more speed with only 4” of extra barrel length do you suppose?
Click to expand...
Idk sounds like you have a fast barrel.

A4B2F6C4-7CB3-4456-B3CA-91EF202331B1.jpeg


I bought a a LOT of that Stand1 ammo for my terminus bolt gun that is very ammo picky. I mainly just shoot mk262 and razor core through this match rifle ^
 
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#30
232593 said:
That’s .223. Mine was the 5.56
View attachment 8466201
View attachment 8466202
@hlee 2910 fps
Click to expand...

Superformance wasn't really made for semi autos and actually Hornady advised against using it in semi autos in the beginning but gave some guidance a little later. If it's running fine in your rifle then use it but I would read below and use that info if going to another semi auto rifle. Here is some info from Hornady about it.

www.hornady.com

Superformance in Gas Operated Firearms - Hornady Manufacturing, Inc

Background Superformance ammunition was developed in the Hornady ballistics lab utilizing state of the art test equipment in accordance with SAAMI (Sporting Arms and Ammunition Manufacturers Institute) guidelines for pressure, velocity and accuracy ut...
www.hornady.com www.hornady.com
 
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#32
Rob01 said:
Superformance wasn't really made for semi autos and actually Hornady advised against using it in semi autos in the beginning but gave some guidance a little later. If it's running fine in your rifle then use it but I would read below and use that info if going to another semi auto rifle. Here is some info from Hornady about it.

www.hornady.com

Superformance in Gas Operated Firearms - Hornady Manufacturing, Inc

Background Superformance ammunition was developed in the Hornady ballistics lab utilizing state of the art test equipment in accordance with SAAMI (Sporting Arms and Ammunition Manufacturers Institute) guidelines for pressure, velocity and accuracy ut...
www.hornady.com www.hornady.com
Click to expand...
Can you run Superformance powder in a 5.56?
 
#35
232593 said:
Can you run Superformance powder in a 5.56?
Click to expand...

The Superformance powder sold by Hodgdon is not the same powder used in the Hornady ammo. I think Hornady uses 6 or 7 blends of powders across the lines. That said if Hodgdon oks its use then you can use it.
 
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#36
Rob01 said:
The Superformance powder sold by Hodgdon is not the same powder used in the Hornady ammo. I think Hornady uses 6 or 7 blends of powders across the lines. That said if Hodgdon oks its use then you can use it.
Click to expand...
Tracking that.

I didn’t think standard Superformance would be even close to fast burning enough for 5.56.

So that ammo I bought was not intended for gas guns?
 
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