ANy 7/8" dies will run ont he Dillon. Dillon makes a really good die set though & it is made to run on a progressive press. Lee will work, Dillon works just a bit better.
"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".