Hoe werk geweerkruit?

What is also important is the ratio between case volume and caliber. A big case with a wide neck will require a faster powder, compared to the same case necked down. eg S335 is great in a 308 win, but S365 works better in .243 win.

You will be surprised at how much difference small changes in a case dimensions and capacity can make
Why some powders do better in certain cartridge cases
QuickLOAD will indicate this when doing simulations
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I think you removed more than you think, or there was some other factor involved.

Have a look at what the powder column in early 458 Winchester rounds looked like

I lapped the bolt face of my 204Ruger. I must have taken off less than 0.1mm, and this was enough of an increase in head space (case capacity) to completely throw off my load. I had to add another 0.2gr to get the load back on track.

What is also important is the ratio between case volume and caliber. A big case with a wide neck will require a faster powder, compared to the same case necked down. eg S335 is great in a 308 win, but S365 works better in .243 win.

You will be surprised at how much difference small changes in a case dimensions and capacity can make
Why some powders do better in certain cartridge cases
QuickLOAD will indicate this when doing simulations

Have a look at what the powder column in early 458 Winchester rounds looked like

I lapped the bolt face of my 204Ruger. I must have taken off less than 0.1mm, and this was enough of an increase in head space (case capacity) to completely throw off my load. I had to add another 0.2gr to get the load back on track.

What is also important is the ratio between case volume and caliber. A big case with a wide neck will require a faster powder, compared to the same case necked down. eg S335 is great in a 308 win, but S365 works better in .243 win.

You will be surprised at how much difference small changes in a case dimensions and capacity can make
Why some powders do better in certain cartridge cases
QuickLOAD will indicate this when doing simulations

Have a look at what the powder column in early 458 Winchester rounds looked like

Thanks a lot Folks!

I makes much more sense.

Hoe werk geweerkruit?

Ek verstaan 'n fyn, dun korreltjie (MS 200 / MP200 / S221) wat vinnig ontbrand vir n handwapen. Net so verstaan ek n groter, growwe korrel (S365 / S385) in 'n groot dop.

Waarom gebruik n mens dan S365 in 'n 243? Hoër druk, of wat?

What is also important is the ratio between case volume and caliber. A big case with a wide neck will require a faster powder, compared to the same case necked down. eg S335 is great in a 308 win, but S365 works better in .243 win.

I really like using Ball Propellants, but they seem to be less reliable in a few ways. I wish Somchem released a short cut granular propellant.

Get one of those little coffee grinders and some S365, and let me know how it goes ;)

IMR 7828 SSC (Super short cut)

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Yes, thats the one.

IMR 7828 SSC (Super short cut)

Do you want something between S265 and S335?

What would "short cut granular" be?

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Sorry mate that should have read - Short cut extruded, I am so used to calling it flake - ball and granular ;D

What would "short cut granular" be?

I really like using Ball Propellants, but they seem to be less reliable in a few ways. I wish Somchem released a short cut granular propellant.

Extruded = stafies (S335)

Ball = balletjies/korrels (S321)

Granular = vlokkies / blokkies?

Extruded can be cut to different lengths with the shorter end of the scale being what I would consider 'granular. The vlokkies/flake would be an MS200 kind of thing, i.e little papery disks that don't meter well in a powder measure.

I really like using Ball Propellants, but they seem to be less reliable in a few ways. I wish Somchem released a short cut granular propellant.

Extruded = stafies (S335)

Ball = balletjies/korrels (S321)

Granular = vlokkies / blokkies?

Die ideale dryfmiddel - onmiddelik optimum druk en dit word volgehou tot voor by die loop. In werklikheid neem die druk vinnig toe en dan verminder dit geleidelik. Ongebrande dryfmiddel is weens die keuse van 'n te stadige dryfmiddel. Soms word mens gedwing om baldryfmiddels te gebruik weens te hoë dopvulling. Prestasie van die kombinasie kan egter nog baie goed wees.

Sal 'n hoër lading die ontbranding verbeter, of moet 'n mens eerder 'n vinniger kruit gebruik?

I really like using Ball Propellants, but they seem to be less reliable in a few ways. I wish Somchem released a short cut granular propellant.

Die ideale dryfmiddel - onmiddelik optimum druk en dit word volgehou tot voor by die loop. In werklikheid neem die druk vinnig toe en dan verminder dit geleidelik. Ongebrande dryfmiddel is weens die keuse van 'n te stadige dryfmiddel. Soms word mens gedwing om baldryfmiddels te gebruik weens te hoë dopvulling. Prestasie van die kombinasie kan egter nog baie goed wees.

Dieselfde druk vir 'n langer tydperk.

Baie dankie!

Dit beteken dat die ongebrande kruit net uitblaas as die kruit te stadig ontbrand?

Dieselfde druk vir 'n langer tydperk.