Nate1778
Member
Reloaded 9mm with Hp-38, #7 and Red Dot. went shooting and the Red Dot had a mild flash not noticeable really. The HP-38 had a consistent bright flash, distracting almost. The #7 had a decent flash and fireflies that came out as well. Why is there such a difference to three comparable loads. Is it the powder shape, or burn rate, which are all fairly close. What creates the different muzzle flash. All the lengths and bullets were the same, so the only difference powder and weight.