Use these numbers at your own risk...
H4831 starting at 51G gets you 49K pressure and about 2760 FPS to a max of 55.8G which gives you 65K pressure and 3018 FPS (this appears very hot).
H1000 does not appear to be a great powder for this load as a staring load of 56Gr creating 49.5K pressure and 2,838 FPS is already compressing at 102% capacity, as your brass is fire formed it may have a greater capacity. For completeness 59G will create 59K pressure and 3004 FPS but 107% of capacity.
That is for a stated pressure max of 65K
1 - Does H4831 starting at 51G gets you 49K pressure and about 2760 FPS to a max of 55.8G which gives you 65K pressure and 3018 FPS??
2 - Does a staring load of 56Gr creating 49.5K pressure and 2,838 FPS is already compressing at 102% capacity, as your brass is fire formed it may have a greater capacity. For completeness 59G will create 59K pressure and 3004 FPS??
They do NOT!!
The handloading community has an insatiable hunger for information and data... which is a healthy (and normal) thing.
Unfortunately, this hunger makes them suckers for faux data.
There is an old saying - "If you can't blind them with brilliance, then baffle them with Bull poopie."
If you ever spend any time in the real (commercial) ammunition business, you quickly realize how approximate every thing is - it is an industry that is driven by the concept of "Kinda close I think."
Take a bunch of perfect cartridges, cases are all the same weight, necks are exactly the same wall thickness, and annealed to exactly the same Brinell # hardness, powder weighed with an analytical laboratory scale, same primers, etc, etc, etc...
... and send 10 of each cartridge to each of the ammunition makers in the country, and ask them "What pressure and velocity do these cartridges make"... and you will get a scattering of seemingly random numbers, not even close to each other.
So.... what is done is each manufacture is assigned to be responsible for a group of cartridges - they make the "O-fish-ul standards" for that calibre.
So Remington is assigned the 237 Express, and Winchester loads it, then Winchester buys "Standard" carts from Rem and uses them to calibrate their pressure gun for that calibre... and that production run.
When they start the next run, or reach the next calibration stage, they get more "Standard" carts from Remington.
Which means, in reality, all Winchester is doing, is duplicating the Remington standard cartridge - they don't even have to know any numbers - the gauge could be in Arabic notation, for all that it matters, just set the gauge to "Same as Rem" setting
When you understand how the system works, and how inaccurate pressure guns are, you will understand how silly it is to think a computer program says...
"H4831 starting at 51G gets you 49K pressure and about 2760 FPS to a max of 55.8G which gives you 65K pressure and 3018 FPS."
... and that sentence would have any value or meaning. (But it sounds so, like, scientificy)!
Quickload hasn't got the slightest idea what the velocity is. If it did, you wouldn't have to tweek the burning rate to get the numbers to jive.
It is like saying to the car dealer, "You said this car would give me 43 miles to the gallon, but it only gives me 36."
"Well, change the length of your mile by 0.84 and you will get 43 miles to the gallon, just like I said"
Quickload claims to give you all kinds of "Data", but it is faux data - stuff than cannot be calculated, even if you have the gun in your hands and are testing it right now. And much of the screen data (clutter) has zero value to anyone... but it looks so impressive, doesn't it?
All it can really give you, an approximations of starting and max loads, and approximations of velocities... all the rest is window dressings for those who want to sound "scientific like" to their friends.
