The burning question here is: How accurate was the load? The load sounds like it would be fast enough, but unless you test them from a supported position or a pistol rest, you will know know. Accuracy should take precedence over velocity.
Sometimes you get what you pay for, sometimes you only pay more for what you get.
Three shots are not a "group"...they are a "few".
If the Bible is the literal, infallible, unerring word of God...where are all those witches I am supposed to kill? (Exodus 22:18)