A lot depends on how she wants to carry it. For a carry piece, I'd recommend a hammerless if I was asked. Less chance to snag, and you aren't likely to be shooting single action if you have to pull in a defense situation. There are also "compromise" guns that have a round back and a recessed hammer, so they are both snag free and allow thumb cocking, but at the cost of a bit of concealability. The older Bodyguard comes to mind, but I'm not a big enough S&W guy to tell you all the models it came in.
have her try out many different ones.
Just want to iterate this. I'm not partial to one way or the other when it comes to the hammer, but for a woman who sees the firearm as a utilitarian tool and will devote minimal time to practice for proficiency, I almost think the hammerless variety wins out by a bit. She won't have the option when at the range to "cheat" in SA mode all the time. Her efforts will have to be DA, just as they are likely to be in real life. Train with it the way it will be used when hell breaks loose.One thing to consider... if you get a revolver with a hammer for single-action shooting, make sure there's plenty of practice in double action as well, especially follow-up shots. Any defensive engagement is going to be double action exclusively, and that takes some practice to handle well, especially if all you're used to is the light, short single action trigger.
OK as a firearms instructor we have OCD
Seriously though nothing beats a good quality DAO revolver
As long as we are being OCD, isn't a DAO actually single action? Is it not more accurate to say "trigger cocking only"? I mean if we are OCD?
Without a hammer, one has to roll check on the trigger. I want the hammer because I am a safety nanny.
Whatever you get , buy them in pairs. Shoot the snot out of one and carry the other.
Why not a M638 shrouded hammer?
What's a roll check?
As long as we are being OCD, isn't a DAO actually single action? Is it not more accurate to say "trigger cocking only"? I mean if we are OCD?
Without a hammer, one has to roll check on the trigger. I want the hammer because I am a safety nanny.
Whatever you get , buy them in pairs. Shoot the snot out of one and carry the other.
Why not a M638 shrouded hammer?
As long as we are being OCD, isn't a DAO actually single action? Is it not more accurate to say "trigger cocking only"? I mean if we are OCD?
Gonna rehash others advice but it will be in the form of my better 2/3's experience.
A couple of decades ago she adopted the S&W Airweight with the shrouded hammer.
Her selection was based upon:
Big enough.
Light weight.
Hammer won't hang up even though it's there if you want it.
Can blow a hole through the front of her shoulder bag even though the Airweight is not for +P's.
Double action.
No ejection jams inside the bag or coat pocket.
Can use light loads for practice and for fun.
With practice she walked cans across the back yard and embarrassed her nephews. With the passage of the years and changes in muscalature the bouncing trigger guard was banging her on the finger and taking the fun out of it. So what to do? We went shopping. Went to store after store and gun show handling available designs. The SP101 with Crimson Trace grips did the trick. She doesn't have any use for the laser but the cats like it. And the grips are perfect for her hand.
Ensuring that the weapon functions properly and does not malfunction because of faulty ammunition by ensuring that the cylinder rotates in a complete cycle (I go twice).
Guys who carry revolvers with concealed hammers have to roll check without a thumb on the hammer. That is not for me.
Single action would be more fun for her at the range. However, hammerless would be more convenient and easy for her to CC because the hammer wouldn't get caught on things in a purse/etc. I would say it depends how much she would shoot at the range, how she would carry, and more importantly, how she feels about the two options.