chance hit

I saw that I had by chance hit the right nail on the head, and that he had, some time or other, done the very thing I suggested.

"It was just a chance hit, Roberts," said he, but his voice held an odd little crabbed note in it.

This chance hit jolted the bridegroom so perceptibly that his father regretted having made it.

And fire it was now; for the men behind him had begun shooting in the hope of a chance hit at the distance.

Again he examined the barricaded window and he was more than ever convinced that his chance hit at Thorne had struck true.