I have a S&W model 36 that I had bobbed....I took about half of the spur off. Turned out to be a bad idea. The bobbed hammer failed to ignite the majority of rounds that were loaded. I tried all kinds of factory fresh ammunition and it was completely random as to which cylinder failed to fire. Wound up having to put a new full hammer back on.
Did it fire reliable before you cut the spur off? Did you change the mainspring?
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)