Anyone know anything about this barrel pressure and bullet velocity spreadsheet?

[GaryL]

Ever get curious about something, start an internet search, and wind up somewhere you've never been before?

This has been around for a while (Feb 2012), so I have to think someone here has seen it before.

http://closefocusresearch.com/calculating-barrel-pressure-and-projectile-velocity-gun-systems

I thought it might be interesting to compare it to some published reloading data. I can think of lots of things it doesn't take into account, since there's a lot you would need to know in order to calculate an accurate value.

Also, I have Not done anything with the spreadsheet. I did download it, but I don't plan to open it until I'm ready to sandbox it. I do have an old laptop that I'm thinking of nuking (it hates Windows 10), so that might be a good place to check it out.

 

[AJC1]

Ever get curious about something, start an internet search, and wind up somewhere you've never been before?

This has been around for a while (Feb 2012), so I have to think someone here has seen it before.

http://closefocusresearch.com/calculating-barrel-pressure-and-projectile-velocity-gun-systems

I thought it might be interesting to compare it to some published reloading data. I can think of lots of things it doesn't take into account, since there's a lot you would need to know in order to calculate an accurate value.

Also, I have Not done anything with the spreadsheet. I did download it, but I don't plan to open it until I'm ready to sandbox it. I do have an old laptop that I'm thinking of nuking (it hates Windows 10), so that might be a good place to check it out.

They have done a bunch of testing, cutting an inch of barrel off at a time... one could gather that data and put it in a spreadsheet. Most of those tests are one shot only, so not the best data set but at least representative. The first one I watched was 22lr which clearly shows longer is not better in a rifle.

 

[GaryL]

They have done a bunch of testing, cutting an inch of barrel off at a time... one could gather that data and put it in a spreadsheet. Most of those tests are one shot only, so not the best data set but at least representative. The first one I watched was 22lr which clearly shows longer is not better in a rifle.

Thanks for the info. Sounds like it might be kind of legit.

 

[AJC1]

Thanks for the info. Sounds like it might be kind of legit.

I don't know the source of their data, but a video or two would validate or disprove their dara.