I am very new to 1911s. In the process of shopping I was in a shop that is noted for building high end 1911s, $3K and up for their guns. I was looking at a factory gun in their case and rather than just dry firing the gun to lower the hammer I put my thumb on the hammer pressed the trigger and lowered the hammer with my thumb. The sales guy just about jumped across the case and said "NO DONT DO THAT", "you could break the sear like that". I believe he said something about catching the sear in the hammers half notch. What say you, any truth in what I was admonished for?