Method around lack of load data

[AkMtnRunner]

I got to thinking a few nights ago. In instances when powder choices are limited and those that are accessible don't match up with existing published load data, of a way to identify more good alternatives to shop for. Here's my idea and I'd appreciate some feedback. My example will be with the 33 Nosler. Of the limited data, I haven't been able to find any top performing powders for this cartridge.

Step 1. Determine these numbers:
Case volume loaded with choice bullet (V). At least Nosler lists H2O volumes with loaded bullets.
Cross sectional bore area (A)
Ratio of V/A
Sectional density of choice bullet (SD)

Step 2. Look to other calibers
Find the cartridge with similar V/A ratio above.
Look to the load data of the bullet weight with similar SD
Consider copper vs lead density with load density %

Example:
33 Nosler with a 225 grain ttsx
V/A = 914 (H2O gr per in^2)
SD = 0.28

In the .243 caliber, I see 6mm XC w/115gr; .264 caliber, 6.5x55 Swedish w/140gr; .284 caliber, .284 Winchester w/160gr; .308 caliber, 300 WSM w/190-200gr; .375 caliber, 375 RUM w/260-300gr.

I find many of the same powders working well across these.

Well, would this be a safe way to find some other good powder candidates?

 

[Keith Stone]

I think I would just look at a burn rate chart

 

[wildwilderness]

It’s called QuickLOAD ballistic prediction software

 

[A382DWDZQ]

Or Gordon’s Reloading Tool, but I generally use QL.

 

[Mike D Texas]

It’s called QuickLOAD ballistic prediction software

This right here.


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[RS_Non-Res]

Yep... Quickload is the 21st century way.
But it ain't perfect, so start low and work up.
You're basically wildcatting so all the other caveats apply too.

 

[SDHNTR]

What’s wrong with Noslers data?

I see H4831sc, RL 17, 19, 22. Those aren’t too hard to find. H4831sc and RL 19 are in stock right now. Use shootingbot.com

 

[AkMtnRunner]

What’s wrong with Noslers data?

I see H4831sc, RL 17, 19, 22. Those aren’t too hard to find. H4831sc and RL 19 are in stock right now. Use shootingbot.com

I am in Alaska and getting powder shipped up here is a PITA having to go hazmat. I haven't seen any of those powders you suggest up here in over a year.

 

[AkMtnRunner]

Yep... Quickload is the 21st century way.
But it ain't perfect, so start low and work up.
You're basically wildcatting so all the other caveats apply too.

I haven't had Windows in over a decade.

 

[mcr-85]

Or Gordon’s Reloading Tool, but I generally use QL.

I just got the Gordon's reloading tool software not too long ago. I've never had Quickload. Do they both produce similar numbers?

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[wildwilderness]

I am in Alaska and getting powder shipped up here is a PITA having to go hazmat. I haven't seen any of those powders you suggest up here in over a year.

Where are you in AK? I know of a connection to try in Eagle River for powder…

 

[RS_Non-Res]

I haven't had Windows in over a decade.

Yea, the one in the AppStore isn't the one you want.

 

[AkMtnRunner]

Where are you in AK? I know of a connection to try in Eagle River for powder…

I am in Palmer but commute through Eagle River. PM sent.

 

[Clarktar]

I could use some powder also!

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