My First PCP: RTI Prophet

You really need a chronograph. You have already spent more on pellets than a chrono would have cost you. To use ballistic calculators, find the max speed for a reg setting, the speed for best efficiency and most accuracy all require a chronograph. Like I said before, you are wasting air and lead with speculation. Just buy one because your whole review is based on speculation. 
 
https://www.amazon.com/Caldwell-720001-Ballistic-Precision-Chronograph/dp/B00HTN5DTE/ref=sr_1_3?dchild=1&keywords=chronograph&qid=1600704095&sr=8-3

This is the same I have, it has been working great for me, you can grab one used for $77, I think that's exactly what I got, used but fulfilled by Amazon in case I need to return, you will have a month to return

The new cover design is going well, I'm glad the magazine is working for you! Those extra shots really help me, hate to run low when I'm hunting