• Visit Brownells
  • Visit AR15 Builder
  • Visit
  • Visit Site
  • Visit Beachin Tactical
  • Visit
  • Visit Ballistic Advantage
  • Visit Aero Precision
  • Visit Cabelas
  • Visit Faxon
imschur

Hornady Superformance Ammunition in Gas Operated Firearms

19 posts in this topic

That piece of information is good for a lot of things, besides just that particular type of ammo.

Share this post


Link to post
Share on other sites

They've got to be talking about the propellant here - I don't see how the actual projectile could have any affect on the gas pressure.  I have read that you don't want to use this projectile suppressed (didn't learn many details, besides it not working very well suppressed).

Share this post


Link to post
Share on other sites

Yes , the weight of the projectile will produce differences in pressure ,but you are probably right about it being mostly about the propellant & its pressure spiking or pressure curve .

Which may be why it may not be good for suppressed applications .

If you read into into it , you will see that some of the problems some are having with brass deformation can be caused by the loads & what type of gas system is being used .

Some here should take note of that.

Share this post


Link to post
Share on other sites

The Superformance ammo is not intended to be used in the AR platform, as told to me directly over the phone by the Hornady representative.

Share this post


Link to post
Share on other sites

I'd imagine it is like the ol' "Light Magnum" cartridges they were marketing a decade ago.  Kinda like +P loads for bolt-action guns, don't use in semi-autos.

A couple of hundred extra feet per second and a shorter gun life, or a few extra inches of hold over when sighting?

Jon

Share this post


Link to post
Share on other sites

Would like to see an additional review of adding weight in the BCG to slow the action as an alternative to an adjustable gas block.

Share this post


Link to post
Share on other sites

I think an adjustable gas block is ideal for solving the issues raised.  I don't think I'd want to modify my buffer/spring combo or add weight to my BCG just to shoot some specific ammo.  Get an adjustable gas block for less than $100 and tinker with it (start by completely turning the gas off) until you've got reliable function and (hopefully) best possible accuracy without stressing the action.  With the adjustable gas block, you can tweak it with ANY ammo, not just the superperformance stuff. 

Share this post


Link to post
Share on other sites

After this article I'm finally thinking seriously about just that for my DPMS. Not so much for Hornady ammo, but for my own reloads.

Share this post


Link to post
Share on other sites

I ran a Slash's Heavy Buffer & a adjustable gas block at the same time. One of them had to go & now I run stock carbine buffer/spring in UBR & the adjustable gas block. I think it's better since I only shoot my own recipe's & it is beneficial to me to be able to taylor gas system pressure for the particular load.

The amount of turns from valve closed too the required valve open setting for a particular load can be recorded and noted in your load recipe notebook, or whatever you call it. May have to adjust for weather. YMMV

Edit; Of course it matters that I run a JP low mass bolt carrier which is intended to run with adjustable gas block so, well so the system is working pretty good now that I tossed the heavy buffer.

Share this post


Link to post
Share on other sites

I ran a Slash's Heavy Buffer & a adjustable gas block at the same time. One of them had to go & now I run stock carbine buffer/spring in UBR & the adjustable gas block. I think it's better since I only shoot my own recipe's & it is beneficial to me to be able to taylor gas system pressure for the particular load.

The amount of turns from valve closed too the required valve open setting for a particular load can be recorded and noted in your load recipe notebook, or whatever you call it. May have to adjust for weather. YMMV

Edit; Of course it matters that I run a JP low mass bolt carrier which is intended to run with adjustable gas block so, well so the system is working pretty good now that I tossed the heavy buffer.

 

Why can't you run a heavy buffer with an adjustable gas block? If you adjust the gas down to low it negates the heavy buffer? Im just curious because I was thinking about purchasing both but sounds like one or the other.

 

And BTW you pic is damn distracting!

Share this post


Link to post
Share on other sites

308Lite

You can run a heavy buffer with an adjustable block. Nofail was just saying that he's running the JP lo-mass carrier.

 

I run one of Slash's heavy buffers with an adjustable block on two of my AR-10 carbines. PRI block (JP block on the other), CAR10-XH buffer & spring, UBR, and a standard Armalite bolt carrier.

 

The combo of the JP lo-mass + the restricted gas + heavy buffer could cause problems. Though.......you would still think that you could find the sweet spot eventually. Haven't played with any of the lo-mass carriers personally yet.

Share this post


Link to post
Share on other sites

 

And BTW you pic is damn distracting!

 

He's been working on that for a while now.  That Gazelle thingy from the weird pony-tailed dude works wonders eh?

Share this post


Link to post
Share on other sites

Nothin?....damn. Tough crowd.

Share this post


Link to post
Share on other sites

Nothin?....damn. Tough crowd.

 

 

Crickets & Tumbleweeds bro, gotta learn to love 'em!

Share this post


Link to post
Share on other sites

308Lite

You can run a heavy buffer with an adjustable block. Nofail was just saying that he's running the JP lo-mass carrier.

 

I run one of Slash's heavy buffers with an adjustable block on two of my AR-10 carbines. PRI block (JP block on the other), CAR10-XH buffer & spring, UBR, and a standard Armalite bolt carrier.

 

The combo of the JP lo-mass + the restricted gas + heavy buffer could cause problems. Though.......you would still think that you could find the sweet spot eventually. Haven't played with any of the lo-mass carriers personally yet.

Thanks for taking the time to explain that. I'll carry on with my plan to get both. Wish there were a few more options for a railed adjustable gas-block, Ive only seen a couple.

Edited by .308LiteHunter

Share this post


Link to post
Share on other sites

Hornady Superformance 165gr GMX works fine in my PSA PA10 18" mid length. No feeding or cycling issues. Sure, Superformance is primo bolt action ammo, but should be safe and effective in most rifle length and mid length gas systems.

Share this post


Link to post
Share on other sites

I can't believe I haven't posted to this topic. I have tested (shot)this powder from two different guns a 20" and 24" barreled rifle gas length 308ar guns. With a rifle gas length setup the it works just fine. I was shooting at a target 800 yards and tearing it up on à poster size target. I shot 80 rounds(4mags) that day without a fte or ftf. I would requamend this powder for magnum cases like the WSM in a bolt action gun.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now