Spawn Casings on HDCasingBits, not SevenMilBrass

If these are set to be persistent, they cause problems when dumping 7mm casings out of backpacks, etc.

At least this way they can still spawn on top of casing spawns, but only when random casings are meant to be spawned

zscript/HDBulletLib/SpawnHandler.zsc

@@ -274,7 +274,7 @@ class HDBulletLibAmmoSpawner: EventHandler {
         addAmmo('HD50OMGBoxPickup', spawns_50omgbox, hdb_50omg_persistent_spawning);
         // .50 OMG Casing
         Array<HDBLRSpawnAmmoEntry> spawns_50omgcasing;
-        spawns_50omgcasing.push(addAmmoEntry('SevenMilBrass', hdb_50omg_casing_spawn_bias));
+        spawns_50omgcasing.push(addAmmoEntry('HDCasingBits', hdb_50omg_casing_spawn_bias));
         addAmmo('HDSpent50OMG', spawns_50omgcasing, hdb_50omg_persistent_spawning);
 
         // .45 ACP Box Pickup
@@ -435,7 +435,7 @@ class HDBulletLibAmmoSpawner: EventHandler {
         addAmmo('HD3006BoxPickup', spawns_3006box, hdb_3006_persistent_spawning);
         // .30-06 Casing/Brass
         Array<HDBLRSpawnAmmoEntry> spawns_3006casing;
-        spawns_3006casing.push(addAmmoEntry('SevenMilBrass', hdb_3006_casing_spawn_bias));
+        spawns_3006casing.push(addAmmoEntry('HDCasingBits', hdb_3006_casing_spawn_bias));
         addAmmo('HDSpent3006', spawns_3006casing, hdb_3006_persistent_spawning);
 
         // 4-Gauge Buckshot Box
@@ -486,7 +486,7 @@ class HDBulletLibAmmoSpawner: EventHandler {
         addAmmo('Savage300Ammo', spawns_300savageammo, hdb_300savage_persistent_spawning);
         // .300 Savage Casing
         Array<HDBLRSpawnAmmoEntry> spawns_300savage_casing;
-        spawns_300savage_casing.push(addAmmoEntry('SevenMilBrass', hdb_300savage_casing_spawn_bias));
+        spawns_300savage_casing.push(addAmmoEntry('HDCasingBits', hdb_300savage_casing_spawn_bias));
         addAmmo('Savage300Brass', spawns_300savage_casing, hdb_300savage_persistent_spawning);
 
         // 7.62 Tokarev Box Pickup