What length of Tapcon/ramset nail for base plate?
One thing to think about is; how old is the cement? A very old cement breaks up with a ramset. Tapcon screws with the washer are a very good choice if you might be moving things.
Make sure to use the correct size drill bit (some boxes come with the right bit). Don’t over torque with the screw in the cement it will break or pull out as you have read.
On new construction I use a ramset, on something older than ~10 years I use Tapcon and have had much better success.