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Reloading Techniques For Reloading


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Spreadsheet for reloading

 
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  #1  
Old 01-07-2010, 12:04 PM
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Join Date: Jan 2003
Location: Texas
Posts: 295
Spreadsheet for reloading

I've built a couple of spreadsheets that I think are handy so I thought that I would share them with the reloading community here.

I use one for documenting my load when I use a chronograph. It calculates the following for a 1 to 10 shot group for 7 different loads:

Number of shots
Lowest velocity
Highest velocity
Average Velocity
ES
Energy in ft. lbs
SD (note- Standard Deviation is a statistical value. 10 data points is the least number recommended by most chronograph mfgs and a very small sample. Statisticians will tell you that SD is only as good as the number of samples and they generally wrinkle their nose at a sample as small as 10. If you have less than 10 data points the spreadsheet will still calculate a result but it's probably not of much value)

Just fill in the blanks that you can before you go to the range and add the velocity and atmospheric data once you get there and start shooting. I take a printed copy with me but it will load on to a PDA (I loaded it on my Dell Axim 50). Once you get home you can type in the recorded values and do file Save As and save a copy specific to a particular test.

I also use the sheet when I don't use a chronograph. It's handy for keeping track of what loads that I've tried. I also have columns to record atmospheric data as well as data about the load that I am testing (caliber, BC, powder, bullet, etc.). The spreadsheet is protected to prevent accidental over writing of a formula. If someone wants the password I will gladly give it out. For that matter, if Len wants to include it when he edits the post that's fine with me. Who knows, maybe someone will get froggy and change the calcs to handle a larger sample size

I use the other spreadsheet to give me an overview of what charges I will use for a specific cartridge. When I go to the loading bench all I take with me is one sheet of paper rather than the manual. Once the loads are built I put the printout into the cartridge box with notes on which row contains which load. This doesn't sound like it would be that handy but I list every powder that I have on hand and I have a tab for rifle and a tab for pistol. I know this is going to make some long time reloaders wince a little but we have a lot of new to reloading people out there (that's a good thing). By listing all of the rifle powders on one tab and all of the pistol powders on another the likelihood of accidentally loading a rifle powder in a pistol case or vice-versa should be diminished since the "recipe" is for a specific powder is right there. Another benefit is that I only have load info for the powders that I have on hand. I don't have to worry about weeding through all of the other data. I thought about breaking it into caliber specific tabs but decided it would be more useful to more people if I did it this way. To tweak it to your liking just remove the powders that you don't have and add the ones that you do.

If Len posts the sheets that I sent him then they will already have data points entered in a couple of columns. Just delete the blue and red colored info. BTW- I used red to indicate max or over max charges in.

Feedback is appreciated but not necessary.
Attached Files
File Type: xls Load Information.xls (35.5 KB, 0 views)
File Type: xls Load Data Summary.xls (37.0 KB, 0 views)
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Last edited by Mike6158; 01-07-2010 at 01:46 PM. Reason: Len put spreadsheets online
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  #2  
Old 01-31-2010, 02:17 AM
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Join Date: Oct 2009
Location: Thunder Basin, WY
Posts: 1,788
Re: Spreadsheet for reloading

I like the LOAD DATA SUMMARY sheet.!! Good Idea. That's a nice way to keep all the data on one sheet, AND have the computer do all the calculations too. I plan on doing alot of load testing over the next couple of years, as I've got 3 custom guns being built currently. I like to find the best load for each rifle and then, once I've found it; I'll load up a few hundred rounds. I'll probably find this easier than keeping it all in "scribble" form in a small notebook....LOL.

Thanks for sharing this
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  #3  
Old 03-04-2010, 11:12 AM
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Join Date: Aug 2008
Location: Texas
Posts: 3
Re: Spreadsheet for reloading

Nicely done.
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  #4  
Old 06-30-2010, 11:00 PM
Silver Member
 
Join Date: Oct 2006
Posts: 484
Re: Spreadsheet for reloading

It depends on what a guy is trying to accomplish.
10 years ago I was using a spread sheet when I tried to work up ever powder and ever bullet combination in 9mm to case failure or case full.

These spread sheets look like a Sierra load book.
I really like the Rifle Sierra data, but that is not how I am currently organizing.

Right now I have hundreds of guns with ~ 60 different cartridges. I write up range reports and email them to friends. Each time I am about to do something new, I do a search on that gun and that cartridge to see where I left off.

Most guys organize their reloading with shelves of dies and shelves of bullets.
I have a file folder box with the dies and brass for a cartridge. I have the bullets in another file folder box. This way everything for a project is already kitted up.
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  #5  
Old 07-02-2010, 08:24 PM
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Join Date: Feb 2009
Posts: 3,542
Re: Spreadsheet for reloading

Good idea, I really like using xl spreadsheets and can see putting this one to use. Thanks for doing the work and sharing with the rest of us.
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  #6  
Old 07-09-2010, 07:38 AM
Silver Member
 
Join Date: Apr 2009
Location: MD
Posts: 107
Re: Spreadsheet for reloading

Nice spreadsheets. Only thing that I saw in your spreadsheets that might have made it a little easier on you at the time was for the standard deviation calcs. Instead of the formula you used (which is absolutely correct) you could have just entered " =STDEV(B19:B28) "

Very nice sheet and useful as well.
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  #7  
Old 07-19-2010, 12:37 PM
Junior Member
 
Join Date: Mar 2010
Location: Utah
Posts: 7
Re: Spreadsheet for reloading

Thanks for the spreadsheets, they will come in handy, I'm just getting ready to start reloading for a LRH rifle that I just finished building, thanks again.
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