Home Forums Hunting & Shooting Custom Rifles & Wildcats AI fire forming and velocity vs using formed brass

I’ve owned three AI cartridges and still own and use two - 223 and 243 AI.

Generally my fire forming loads have been different to what I ultimately use in the formed cases or “working loads”.

This time around in the 223AI I’m using identical FF loads and working loads. Everything is exactly the same except for the unformed vs formed cases.

Can someone explain why it is that the formed cases are generating higher velocity than the exact same load used in unformed cases? It doesn’t make too much sense to me.

ie The forming loads are generating 2910fps and the formed working loads are making 2960fps.

Is it possible the forming of the brass is “absorbing” some of the energy and hence reducing MV?

Brass is FC, bullet is Hornady 75g BTHP and powder is H4895.

The forming takes pressure, and that takes energy.

So, the formed brass is giving higher velocities because it has no work to do forming the brass, and all of the energy goes into pushing the bullet down the barrel.

This time around in the 223AI I’m using identical FF loads and working loads. Everything is exactly the same except for the unformed vs formed cases.

Can someone explain why it is that the formed cases are generating higher velocity than the exact same load used in unformed cases? It doesn’t make too much sense to me.

You guys are misinterpreting the OP’s statement. He isn’t “forming” cases. He’s already formed the AI cases.

He wanted to know why using the same amount of powder, bullet and primer (same components) in the two different cases, unformed and formed, had a different fps.

That's why I went into detail to explain the difference.

^^^^This^^^^

Wrong as usual.

David is correct.

There's no point in arguing with someone who's reading comprehension is as bad as yours, when it is bolded and underlined for their benefit.



You see that?

He's talking about shooting cartridges where the case has already been formed.

That is why he SPECIFICALLY STATED, "unformed vs formed"

They have "already" been "FORMED".

I'm not wrong as usual.

You're just a freaking troll.

One thing hasn't changed - your stupidity is limitless.

David

You guys want to see a troll?

Here’s this clown calling me stupid, when he is trolling by searching my posting history, so he can go directly to this man’s thread, where I tried to help him, and this troll disrupts it, so he can “troll” me….yet he has the gall to call me stupid.

That is what you get on this site trying to be helpful. All you get is polesmoker’s friends trolling me, all over this site. That is all I have had from the day ole polesmoker trolled me back last September, when he, again, inserted himself into a conversation and attacked me, just to start arguing with me. And now ever since I humiliated his azz, every swinging troll dic friend of his on this site thinks they have the mental weight to out wit me, and I love grinding these trolls noses across the concrete for the world to see just how mentally sick they are.

These are some sick sumbitches on this site.

The 2% of load density in the A.I. case without powder is air, which has oxygen in it, which contributes to a hotter burn, which equals more pressure, which gives you the additional 50 fps readings you are seeing in the .223A.I. case.

The same theory above applies to your 75 grain bullet no matter what the powder charge is, being the powder charge is the same amount of grains in both cases. The additional oxygen, in the higher capacity A.I. case, is creating a hotter burn, more fps.

Nobody is following you around princess, you're smearing your stupidity all over the forum - it's difficult to avoid.

Please elaborate some more on the effects of oxygen on burn rate of smokeless gun powder...




World class stupidity.


David

Nobody is following you around princess, you're smearing your stupidity all over the forum - it's difficult to avoid.

Please elaborate some more on the effects of oxygen on burn rate of smokeless gun powder...


World class stupidity.

David

Not to twist the knife any deeper into you, but could you stop "smearing your stupidity all over the forum".

It should be affects.

World class stupidity.

Not to twist the knife any deeper into you, but could you stop "smearing your stupidity all over the forum".

It should be affects.

World class stupidity.

There are three items needed for combustion: ignition, fuel, oxygen.

It is more than apparent you have not the first clue how varying the amount of oxygen affects combustion.

I’ve spent thousands of hours in dyno rooms, and seen the results of “my” changes, on a computer print out after a pull, after altering the components of combustion.

I’ve also done the same in my field of work over decades.

I think I know a little more about combustion than what you just showed.

Nice try, and thanks for the laughs.

P.S. Why do you think when reloading a black powder cartridge, you don’t have an “AIR SPACE(OXYGEN)/ ADDED VOLUME” between the powder, and the bullet?

P.P.S. What do you think that “AIR SPACE(OXYGEN) / ADDED VOLUME” in the combustion process would do to the PRESSURE……genius?

NoWWWW……WHO HAS THE WORLD CLASS STUPIDITY?

You’re changing the FUEL(gunpowder):AIR(oxygen) ratio in the cartridge when you increase the volume of the A.I. cartridge, and if you don’t think “leaning out” that combustion chamber increases pressure, you’re a damn fool.

Run along troll…..you’re clueless, and just had your azz handed to you.