So I am going to send my pair of 64-6 4" HB RB K-frame to Mr Sokol soon. I want to provide the front sight, in specific a Dawson Precision NLM FO sight that is .115-.125 wide. My question has to do with height. These heaters will fire the Speer 135gr+P. To anybody that has trimmed a 4" barrel to 3", had a NLM styled sight installed, and shoots the Speer load, what height did you go with? Some say .150, others .160, will it make a huge difference?