Cartridge “optimization” formulae?

[ELR researcher]

I have gotten the impression from reading some of the SH posts that there is some “optimization” formulae to determine whether a cartridge is properly “optimized’ (I think the idea is “balancing” a cartridges parameter – case shape, capacity, etc). I did searches on SH and found nothing. Is there such a “formulae” or anyone recall threads that touched on that?

Thanks.

 

[The Mechanic]

Re: Cartridge “optimization” formulae?

It is called "QuickDesign". It goes well with Quickload.
http://www.neconos.com/category/Software-2

 

[ELR researcher]

Re: Cartridge “optimization” formulae?

My feeling is that what was mentioned was not QuickDESIGN. In any case, I believe you mean QuickLOAD which applies powder type and "calculates" a pressure value - given specific case and projectile physical and locational dims. You "design" in QuickDESIGN and then import to QuickLOAD for "evaluation".

 

[saojao]

Re: Cartridge “optimization” formulae?

ELR,
As im sure you are aware, every case design is different, with a different end goal. There is no magic formula. Expansion ratio and projectile weight to propellant charge are good starting points!

 

[ELR researcher]

Re: Cartridge “optimization” formulae?

saojao:

Great! What are those formulae?

If they are a starting point, are there others also? If so, please provide.

Thanks much!

 

[bohem]

Re: Cartridge “optimization” formulae?

edited for unprofesionalism.

Look up "Ken Howell"

 

[Noel Carlson]

Re: Cartridge “optimization” formulae?

There are only four people that I am aware of who have a full theoretical understanding of case optimization, and none of them publish(ed).

Hays Zeigler, once in charge of R&D in this area at ATK, was very open to inquiries by amateurs like me... but with his passing a few years back, resources are limited.

Of all topics that could be subjected to analytical discussion on this board, internal ballistics is least likely to produce fruit beyond the basics.

 

[Powder_Burns]

Re: Cartridge “optimization” formulae?

PO Ackley talks about powder, bbl length, and bullet diameter ratios to describe a cartridge as being 'over-bore' in Handbook for Shooting and Reloading volume 1.

 

[ELR researcher]

Re: Cartridge “optimization” formulae?

bohem:

Thanks for the lead. I found several threads in this forum. I will also search elsewhere for him.

 

[ELR researcher]

Re: Cartridge “optimization” formulae?

Powder Burns:

Thanks for the lead. I have Ackley's "Handbook for Shooters and Reloaders" (no "volume", circa early 50s, well worn bright yellow cover, yellow plastic spiral binding). No index or TofC, so may take a bit to find that info. But now I know to look. [Had some notes on a piece of paper in the back..."Rifle complete - $525 incl tax." An absolute pearl of a book.]

Thanks again and God Bless!