I'm too lazy to test it myself, but there are some gun stats online, not sure if they're datamined or hand-tested.
https://www.rockpapershotgun.com/2019/03/12/apex-legends-hemlock-stats-dps-ttk-spray-pattern-hemlok-burst-ar-tips/
Hemlock Single fire cap fire rate: 8.4 shots/sec, dps 151.2
So I was quite right, that hemlock can't even come close to R301 in terms of TTK. Also, 8.4 shots/sec is quite doable just fast-tapping, you don't even need any inconvenient workarounds. And since hemlock doesn't beat the better CQ/mid-range weapons, you would only use it for long range tapping (if you don't have anything more suitable for that, like scout or longbow), for which slow-tapping will be most effective (something in the range of 3-4 shots/sec).
Here, see if you can do an 8.4/sec (I can average 6-7 with burst of up to 9/sec; I can also do 13/sec twitch-clicking, but aiming is really not an option with that):
https://cookie.riimu.net/speed/