Hey this is my first time on here so if I don't post this right forgive me.
My question has to do with shaft flex to have in my driver. I'll try to be brief so as to get to the point.
Couple months ago I went into a store and hit some shots on the launch monitor with a stiff shaft driver. Been playing stiff for years. Well my swing speed I found out was surprisingly about 112 when I was smoothing it. Hence the errant weak drives. If I really went after it it got upwards of 117. So I changed my driver to X stiff and hit 290-300 average with about 112 swing speed. On the course I don't hit it that straight and high at 8.5 degrees but that's more me than any club. Although I like heavier clubs for their accuracy.
Recently went in again and hit a xxx long drive krank formula 5 with 5 degrees of loft. It had a midsize grip on it and some decent weight on the shaft and grip. When I didn't really go after it I hit it weak high and fade with about 108 swing speed. But consistently twice I smoked it with using my mike Austin swing principles and hit it 330 and didn't feel like I really went after it that hard.
Now I don't remember my swing speed on those I wasn't paying attention to that sadly. My questions are two things. First, do the monitors deceive me an I'm either not at a lower swing speed or I don't actually hit it 330? Would I be stupid to get a xxx stiff shaft because I kill it on the monitor?
Thank you in advance for any advice.