Here's my 20 rounds worth.
M5 Mausingfield
Brux 1:8 twist 6.5 Creedmoor (Saami chamber), 21" long #4 contour
Shouldered Barloc
SRT Arms magnum Ti suppressor
147gr Hornady factory match ammo
100yd indoor tunnel off bags
First I fired a 6 round group (lost count and fired an extra round). Then I removed the barrel and replaced it via sharpie index lines on either side of the stock show-line. Torqued the barloc hand tight with an allen wrench (sorry, no torque wrench here). Fired a 4 shot group. Removed and replaced the barrel, and fired the final 5-shot group on the right side of the target. POA for all three was the center of the square.
Then I put 1 mil left on the scope, and fired the remaining 5 rounds with variable torque on the barloc screw (same POA). The first round was with just enough torque to prevent the barrel from spinning freely. From there I gave each successive shot what I presumed to be about 1/5th increase to a "normal" final torque value (5th shot).
View attachment 6918693
So it would seem that variable torque may slightly change POI, but it doesn't seem drastic in my case. I attribute the POI shift from the removing of the barrel more to indexing of threads/parts than torque value. Changing torque doesn't appear to help accuracy any-- not sure if #2 is a flier or not. About 0.5 mil spread, center to center of the 3 groups.