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They’re better in that respect, yes. In fact just after I posted that I looked at the two beam wrenches I also have, one Park, one made in Brum, and the Brum one was out by about 10% at rest. I just tweaked it back by hand. Doesn’t fill me with confidence.
Having said all that, my hand is a pretty good guide, and I can usually torque up pretty accurately by hand over a good range. Practice, I guess.
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In theory there isn't anything to go wrong on a well-made beam wrench unless it's massively over-torqued; any offset at zero is most likely due to the pointer being dinged rather than yield of the torque element. As you say, clicky wrenches can be dangerously finicky unless maintained and calibrated.
Beam wrenches tho? Thought they might stay close to spec for long enough.