Hello, I'm a 65 yr old guy who's been pistol shooting for about a year and a half. I already own three. My main shooter is a M&P 9mm 2.0 4.25". I think I'd like to have an Apex, flat faced trigger installed, but I don't have any idea of what weight to have it set. I'm thinking four pounds would comfortable and safe weight, but have no point of reference. Do gun shops have some sort of adjustable trigger jig device that can be set to various weights so customers can test the trigger weights to determine what weight would best suit them?
Thank you, Danko--