Im new to handguns. I bought myself a taurus 709 took it to the range for the first time today. My front sight was turned to the left a little dont know if anybody elses is like that so I unscrewed the sight and made it straight. Starting shooting and kept shooting low right and made some chances to the sight and got off a couple arounds before my front sight came off. Does anyody know why it would be shooting low right? and what would be a good sight to replace it with?