I have a columbia 29 and the previous owner used to blue water a lot from boston to Bermuda and beyond and up to Maine. However the only problem, rather horror story is the time high swells kept flooding the **** pit, ran the battery down using the bilge pump constantly. Couldn't get the motor started from inside the boat... but actually I think they were to busy holding on to think.
Once I take the inboard motor out and get rid of the gas tank I plan on putting about 2 to 3, 3" thru hulls going from the back of the **** pit straight out the back horizontally. This will increase drainage. Their main problem was the **** pit filled with water and the little 1/2 drains couldn't get rid of the water fast enough, and the water kept splashing up against the hatch boards letting water flood in.
But people coastal and blue water in smaller boats all the time, and columbia's are pretty sturdy.