To select the optimum shaft for you, use a pga pro to get fit. Today with all the software, trackman and others devices, it is a scientific experience.
Long time ago, we were using, trajectories and feeling to select shaft. With modern science there is a lot of factors to take care in the equation.
Some factors are: shaft weights, shafts flex, bending point, optimum trajectory, swing speed, tempo, feel, dispersion, distance etc..
Without a competent person to help, it is almost impossible to a a shaft optimized for a specific golfer.

Make sure you have the right shaft before spending the money to reshaft your irons. You can go to a place like the pga superstore and try a number of the shafts they have available. est of luck.

In 2018, I bought a set of CB 716 and I loved the look, feel, and performance. I also play with BV6 wedges and TSR2 woods and utility clubs. I am starting to feel to the clunk of not loading the irons and shots are coming up short. I am wondering if it's an acceptable idea to switch out the True Temper S300 for the R300. I am think this will undermine the design of the club. Looking for insight and opinions. Thanks!