It's always prudent to use exact components, specially when starting out. If you go w/ starting loads & work up, then switching bullet manuf isn't a big deal. Just match the bullet type; JHP, FMJ, LRN, etc, w/ the data used & work up. When you start loading plated, not much data out, lead, not much data out, so you learn to extrapolate.
"Given adequate penetration, a larger diameter bullet will have an edge in wounding effectiveness. It will damage a blood vessel the smaller projectile barely misses. The larger permanent cavity may lead to faster blood loss. Although such an edge clearly exists, its significance cannot be quantified".
Last edited by fredj338; 11-18-2011 at 16:50..