I use a wrench I got off Amazon for my RimX barrel swaps. Per Zermatt’s instructions, barrels should be torqued 30-70 foot pounds. I torque my barrels to 45 ft lbs. Let’s say my wrench has a hypothetical 10% +/- accuracy tolerance which is stupid high. I’m still within spec. I always use the same wrench and same setting. Never had issues and accuracy is pretty damn good with the four RimX barrels I have. I’m no where near the amount padom has but again I’ve had zero issues to date.
With that said, my good wrench is a split beam from Precision Instruments (USA made). I have a barrel swap “kit” I put together with a throw down torque Amazon torque wrench.
Edited to add.. it’s the same wrench as mentioned above from Tekton.