loaded some oregon trails 158gr cast swc over 4.3 grains of unique for my 14-3 six inch smith. i expected this to be a tack driver load. well it wasn't. seven to ten inch groups off a sand bag rest at 25yds. bullets measure consistently at 358. i grabbed a box of remington 130gr fmj factory loads i had for comparison. they grouped 2.5 to 3 inches. what gives? thanks, bob