I have a 6 inch 686-3 smith and wesson .357 mag revolver.When I am out plinking I like to take a long shot now and then.I am now useing a 158 grn. RNFP boolit.A friend told me to try a 180 or 190 grn. Boolit to get better accuracy.Will that really help at long range or maybe not.Thanks for any input.