This is the 11th installment of a multi-week effort to share examples of posters which were presented during September’s Future Force Capabilities Conference presented by the National Defense Industrial Association in Austin, Texas.
I’ll let it speak for itself and contact info is on the poster.
it’s kind of whack only Hornady SBR rounds use a propellant that actually burns up in 10″-11.5″ barrels and still maintain the bare min. velocity needed for 5.56 to be effective. There should be more shows in town offering ammo with faster burn rates with the proliferation of suppressors nowadays. Nobody uses muskets anymore to fire 5.56 so why are still making ammo to 20″ barrel specs?
Maxim Defense offers some SBR specific loads and there are some others that happen to be better in that regard. With 5.56 the issue is Bore-through-volume and pressure, might be a secondary use for Sig cases- you can burn faster powder if you can handle increased pressure. There’s always going to be that relationship between BTV( therefore barrel length) ,loaded case capacity, and burn percentage. Case capacity mods might be another interesting way to go.
The problem is using faster burning powder in a barrel with a heavy for diameter projectile, you get excessive pressures. It’s why you can use faster powders for varment weight .223 loads, but if you try that same powder with a 77gr, you’re going to be too high a pressure. Similarly, you can use fast powders for 300blk 110gr loads.
And the Hornady 75gr TAP really doesn’t give great velocities. It is labeled as a 5.56 round, but its velocities are more inline with 223. It could be they use faster powders for a more sure full burn, but have to reduce the load so they don’t get into proof load pressures.
But hey, I appreciate a lot of the work that Hornady does to further cartridge development and do wish more companies would look into SBR specific loads. It would be particularly nice for a powder company to put something out to the general market.
300blk is a really good example of using faster powders, you can use something like H110 all the way from 240gr down to 90gr because the loaded case capacity varies so much.
Now Stealth Engineering Group was mentioned here in this file! Are they still in business, or have they closed their doors?! *head scratching*