I have a 431pd. Could not find another hammer to bob and keep the original. I just had a gunsmith bob it anyway.I believe it makes my gun the "ultimate" pocket carry. I can still keep my finger on the hammer when i stick it in my pocket and it doesn't snag. Best of all worlds. I buy guns to use for myself and i don't buy them to hold for "value". Made no difference in function. works perfect. Your gun will be better bobbed in my opinion.