I slapped this one together when I heard about the 338 Blackout. 1:3 twist just seems "unreasonable". But... if it's loaded subsonic it looks like it works. On paper. There are some "perfect" assumptions ie no slip or drag...
Spreadsheet for reloading
- Thread starter Mike6158
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I downloaded these sheets years ago and still use them today. Thank you for making them available!!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.
Sheldon Root
Member
Good day everyone. Can anyone on here run a quick load for me. What pressure would be created on a 338/378 Wby Magnum,
using 105.5 gr. of N570, behind a Berger 300 gr. Hunter Elite in a 26" barrel with a 8.5 twist producing velocity of 2985 fps? If you need more info contact me at [email protected] Thanks
using 105.5 gr. of N570, behind a Berger 300 gr. Hunter Elite in a 26" barrel with a 8.5 twist producing velocity of 2985 fps? If you need more info contact me at [email protected] Thanks
At the very least you will need to provide temperature, COAL and fired case capacity in grains of water
jerry moore
Well-Known Member
i've been reloading 35yrs today i started getting blowback 308 700 rem probably shot 30/40 rds since cleaned it does it on handloads & factory has anyone had this prob?
Carbon ring?
jerry moore
Well-Known Member
whats best way to clean, i scrubbed this rifle until patches came out white with Montana extreme everything seemed ok all at once started leaving heavy ring at the bottom of neck
Hugnot
Well-Known Member
Here is one for calculating Sectional Density (SD) & Form Factor (FF)
Reloder28
Well-Known Member
I have a very extensive spreadsheet for my load work. It houses all of my cartridges& subsequent loads. Have used it since 2005. Have not seen anything better for my use. Spreadsheets are great, they pack a vast amount of information.
hicountry1
Well-Known Member
Funny, I've done the same with a spreadsheet, but mine also calcs ballistics, in inches and moa out to 1000 yards, including wind drift, temp and elevation.
I load it on my phone, and use Google sheets. I have a sheet for everything I shoot with me at all times.
Gotta love technology... .
I load it on my phone, and use Google sheets. I have a sheet for everything I shoot with me at all times.
Gotta love technology... .
