I am used to reloading my ammo right out of my manuals, but recently, due to the economy and the lack of available supplies, I decided to try Barry's plated bullets in 147 gr 9mm. I am unable to find a direct recipe for these bullets. I understand the important factor is the sectional density. My manual says the sec density for a 147 gr FMJ bullet is 0.167, but a plated bullet will be different, won't it? Or, am I splitting hairs? Thanks for any help.