Yeah, reviewing is about making sure the methods are sound and the conclusions are supported by the data. Whether or not the data are correct is largely something that the reviewer cannot determine.
If a machine spits out a reading of 5.3, but the paper says 6.2, the reviewer can’t catch that. If numbers are too perfect, you might be suspicious of it, but it’s really not your job to go all forensic accountant on the data.
This is the lab behind the poop knife. They are absolutely experts in this kind of thing.
I need to read the whole paper, but I suspect the weight/wind resistance ratio of the javelin is better, and that the motion of launching an atlatl dart is affected by the downward angle. The railing on the scissor lift likely has an effect, too.