You have to hit it firm to get the cue ball out of the way. At that speed as long as you don't hit the pocket the shot should turn out good even if you don't make it.
Will never forget about ten years back when I was playing a lot and Tony saunters into my poolroom looking for a game. I was beating all the locals at the time (One Pocket and Banks) and playing pretty damn good on my front table, that I knew like the back of my hand.
He asked me what I wanted and jokingly I said 8-4 and he responded immediately, "You got it!" I guess I was in shock by his quick response and more than a little surprised he would give me that game. I had to play! And we did play, for 300 a game. A short time later (and 1,200 down) I decided that maybe this wasn't the good game that I thought it was.