The only recommendation one can give is to get fitted as there are no standards for shafte. A regular for one manufacturer could be considered stiff or senior for another manufacturer. Also a manufacturer could have two different model shafts similar in stiffness with maybe one being marked as regular and the other stiff or senior.

Fitting or testing shafts to see how they perform for you is the only way to go

Sound advice! Fitting is the only way to go!

It's a broken record, and you won't want to hear it, but the only thing is to get fit.
We have no clue what you look like, let alone how you swing a golf club.
I could recommend you what I have but that could be the worst shaft for your game. What I swing and what Don, Dale, Chuck, etc. swing are completely different and likely wouldn't fit you either.

There's no way anyone on here would be able to give you an sort of viable recommendations without knowing anything about how you hit a golf ball.

Take time and schedule a fitting with a Titleist fitter. They have a wide selection of shafts and grips.

My fitter recommended ProjectX shafts and they made a huge difference from my last set. I went

from stiff flex to regular flex and the difference was astounding. The ball went straighter and

farther. It was an education to learn about all the facets of getting your clubs right.

Well, the responders on this site are almost all amateurs and none are from Titleist employed fitters/specialists. There are a couple of professional fitters to complete the list. Many will suggest the best shaft, but that really just applies to them.

Without knowledge of your swing speed or strength, any suggestion would be a WAG (wild *** guess). Shafts can weigh from 50 to 130 g. From graphite to steel fiber to steel. Graphite shafts overlap with many steel shafts. To say they are only (but still mostly) for slower and/or older golfers is not accurate anymore.

Even flex is not a reliable measure. There is no standard for R flex. It only designates that it is firmer than A and softer than S in that one line of shafts. It can’t be directly applied to another line of shafts. If you want, you can learn about shaft harmonics, tipping.

Now the short answer, find a Titleist fitter on the Fitting tab on this site. Sign up with the $100 hold fee (that can be applied to a purchase from that fitting) and let that person find the correct head and shaft combination for your game. They will be happy to explain why they recommend it to you. There are a wide range of shafts that are not an upcharge. Placing a custom order is the same price per club as buying a set off store inventory. Get expert advice and equipment designed for you. That is a bargain at the same price as rack items.

Wow, where to start? There are so many options out there these days, even within a "regular" flex the weight differences and flex kick points can be significantly different to match the needs of your swing. Anything except a fitting will just be a guess. Good news is the cost of off-the-rack Titleist irons is the same as custom built with their standard shaft options so the only additional cost is places that charge a fitting fee. Some will apply the cost to the cost of the irons. You might have an uncharge if you were to select premium shafts but the fitting data should help with those decisions. Once you are properly fit, you can enjoy the irons knowing they are optimal for your swing.

Good morning! I recently went to an extra firm shaft and the control and feel has greatly improved! Steel shafts BTW.

The reason there are so many different shafts is because there are so many different swings. When people say "see a fitter" it's based on experience. The shaft is far more relevant to your swing type than which iron you choose. Find a good Titleist fitter with a full selection and let them help you decide. Any other advice should be ignored. It's also a lot of fun and very educational going through a real fitting.

Absolutely get fitted. I cannot agree with the other posts more on that point. I just met with at a Titleist fitter at a Titleist fitting event and what a great experience it was. Fitted into the T350 irons and into a shaft I probably would not have considered otherwise if it wasn't for the launch monitor numbers and the experience of the Titleist fitter. I cannot recommend it highly enough.