I realize most here are familiar with the sailrite page on sewn webbing loops
I found this video on YouTube from HowNOTtoHIGHLINE channel on sewn loop strength.
I have not finished watching it yet, but it looks to be promising.
How to Sew Webbing Loops
Learn what the strongest stitch patterns are for sewing webbing loops and how to sew webbing for load bearing applications using a handy formula.
www.sailrite.com
I found this video on YouTube from HowNOTtoHIGHLINE channel on sewn loop strength.
I have not finished watching it yet, but it looks to be promising.