Hey there,
After searching the web for a couple of days and with very limited luck (most of the luck I've had was thanks to you guys, actually), I have decided to create my own load calculator for the 8mm Lebel Revolver cartridge. The frustration of having to 'guess' the load with nothing else but my gut feeling was too much - and so I've spent some of my free time working on this little utility that I'd like to share with you.
Basically, I've decided to use the most common data found "out there" for this particular cartridge and the most common powder people seem to use to reload it: Bullseye. What I've done is that I've established a table of all the known data (lead bullet weight, powder quantity & FPS) to then create an average of all these numbers in relation to one another. That average served me in creating a system where you can calculate any theoretical load and obtain the necessary amount of powder you'll need in grains (based on your bullet weight and desired FPS). I guess this would be also very useful for someone who casts their own lead bullets, as those suckers can turn up in different weights, all depending on the alloys & molds used.
Note: I have NOT used data from FMJ bullets to establish these calculations; I've used lead bullet data only for a more accurate measurement. The available "known data" was collected off various sources (internet/reloading manuals).
Anywho, this calculator is pretty neat and should be accurate to approx. 800 fps. I wouldn't push it more than that, as there is no pressure data available anywhere. Even 800 fps seems kind of hot for this cartridge and it should be intended for something like maybe "bear defence" (lol!). Personally, I'll stick to 700 fps max myself.
Here's the link to my file (free download from rapidshare):
http://rapidshare.com/files/246833548/Load_Calculator.xls.html
By the way, this is an Microsoft Excel sheet. If you do not have Excel, then go download & install Open Office v3.1... it's an absolutely free, 100% working & independent (open source) version of Microsoft Office (but not actually made by Microsoft).
P.S. Here's the best part... the file is not locked, so you can actually enter the 'known data' off another caliber/powder and it will still calculate the appropriate loads - but ONLY AS LONG AS YOU DO NOT TAMPER WITH THE MATH FORMULAS! (average fields + spaces highlighted in yellow are the formulas in question)
Enjoy!
After searching the web for a couple of days and with very limited luck (most of the luck I've had was thanks to you guys, actually), I have decided to create my own load calculator for the 8mm Lebel Revolver cartridge. The frustration of having to 'guess' the load with nothing else but my gut feeling was too much - and so I've spent some of my free time working on this little utility that I'd like to share with you.
Basically, I've decided to use the most common data found "out there" for this particular cartridge and the most common powder people seem to use to reload it: Bullseye. What I've done is that I've established a table of all the known data (lead bullet weight, powder quantity & FPS) to then create an average of all these numbers in relation to one another. That average served me in creating a system where you can calculate any theoretical load and obtain the necessary amount of powder you'll need in grains (based on your bullet weight and desired FPS). I guess this would be also very useful for someone who casts their own lead bullets, as those suckers can turn up in different weights, all depending on the alloys & molds used.
Note: I have NOT used data from FMJ bullets to establish these calculations; I've used lead bullet data only for a more accurate measurement. The available "known data" was collected off various sources (internet/reloading manuals).
Anywho, this calculator is pretty neat and should be accurate to approx. 800 fps. I wouldn't push it more than that, as there is no pressure data available anywhere. Even 800 fps seems kind of hot for this cartridge and it should be intended for something like maybe "bear defence" (lol!). Personally, I'll stick to 700 fps max myself.
Here's the link to my file (free download from rapidshare):
http://rapidshare.com/files/246833548/Load_Calculator.xls.html
By the way, this is an Microsoft Excel sheet. If you do not have Excel, then go download & install Open Office v3.1... it's an absolutely free, 100% working & independent (open source) version of Microsoft Office (but not actually made by Microsoft).
P.S. Here's the best part... the file is not locked, so you can actually enter the 'known data' off another caliber/powder and it will still calculate the appropriate loads - but ONLY AS LONG AS YOU DO NOT TAMPER WITH THE MATH FORMULAS! (average fields + spaces highlighted in yellow are the formulas in question)
Enjoy!
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