Have beta blockers improve ranged accuracy and lung capacity. about cataclysm-dda HOT 3 OPEN

Nice finds, though I think you might be reading into it a bit more than is warranted.
The study on pistol accuracy seens like it would only be applicable for pistols in particular, especially as the abstract mentions the effect seems to stem just from reduction in hand tremor. Anything with a stock (riflrs, shotguns, smgs, even pistols with stocks or braces) is already working to cancel this effect out, so would see little to no improvement. We definitely would not apply it to archery.
As for magnitude, that 13% is "score improvement" on some particular shooting contest, need to see the details to tease out an effect in minutes of arc.

from cataclysm-dda.

Apjea tolerance is measured on "elite apnea contestants" with a median apnea length of six minutes and an end-apnea SpO2 of 78%, using both an iv loading dose and a continuous infusion, and while not doing anything otherwise.
Needless to say, you're not that good, you're not hogging a perfusor around, and the main factor of your oxygen use while swimming isn't your resting heart rate.

For the marksmanship value it's looking a bit better, but even the abstract points out that the more skilled marksmen showed improvement, and it's using a 150mg oral dosage (way above the normal starter dose) on naive subjects - given that beta-blockers have a pretty hefty tolerance buildup that effect will only get smaller.

from cataclysm-dda.

Good idea, beta blockers are banned in competitive shooting by the ISSF.

from cataclysm-dda.