So, I did try the Tavor when we were shooting CSRA in Homestead for around 4-5 matches.
I'm a low 500s shooter with my best match around 525 (years ago).
I've shot a Colt H-bar match rifle out there equipped with irons into the low 400s.
The Tavor equipped with a 2.5x10 Nightforce and 69SMKs was high 200s to low 300s - I think my best match was around 325.
I don't have the answers you seek, sorry.
I'm sure google has you covered if you want to go down that rabbit hole.
Rounds sent are only as good as their placement obviously, and if you consider an AR with a 14 - 20" barrel being effective to 500m, and the Tavor ineffective past 300-350m, that could represent a significant gap in capability - potentially.
Well I was trying to direct you to learning something on your own to illustrate the point.
If you would like to have a greater understanding of the issues surrounding your seemly strong opinions, I suggest terminal ballistics, wound lethality, military ammo of Hague convention signatory countries, and how these factors relate to barrel lenght in a military rifle specifically to a 5.56 rifle as we are discussing.