Removes .357 Speed Loaders from Autolathe, replaces with .357 Ammo Boxes (#19553)

* revolvers are balanced now, right?

* decreases metal cost per bullet from 5000 to 4000

* converts bullets to a new ammo box

* shut up Marmite (makes the revolver unrecyclable)

code/modules/projectiles/ammunition.dm

@@ -187,7 +187,7 @@
 	var/num_loaded = 0
 	if(!can_load(user))
 		return
-	if(istype(A, /obj/item/ammo_box))
+	if(istype(A, /obj/item/ammo_box) && !istype(A, /obj/item/ammo_box/b357))
 		var/obj/item/ammo_box/AM = A
 		for(var/obj/item/ammo_casing/AC in AM.stored_ammo)
 			var/did_load = give_round(AC, replace_spent)

code/modules/projectiles/ammunition/boxes.dm

@@ -1,11 +1,21 @@
 /obj/item/ammo_box/a357
 	name = "speed loader (.357)"
 	desc = "Designed to quickly reload revolvers."
+	materials = list()
 	ammo_type = /obj/item/ammo_casing/a357
 	max_ammo = 7
 	multi_sprite_step = 1 // see: /obj/item/ammo_box/update_icon()
 	icon_state = "357"
 
+/obj/item/ammo_box/b357
+	name = "ammo box (.357)"
+	desc = "Contains up to seven .357 bullets, intended to either be inserted into a speed loader or into the gun manually."
+	w_class = WEIGHT_CLASS_NORMAL
+	ammo_type = /obj/item/ammo_casing/a357
+	max_ammo = 7
+	multi_sprite_step = 1
+	icon_state = "357OLD"
+
 /obj/item/ammo_box/c9mm
 	name = "ammo box (9mm)"
 	icon_state = "9mmbox"

code/modules/projectiles/guns/projectile/revolver.dm

@@ -1,6 +1,7 @@
 /obj/item/gun/projectile/revolver
 	name = "\improper .357 revolver"
 	desc = "A suspicious revolver. Uses .357 ammo."
+	materials = list()
 	icon_state = "revolver"
 	mag_type = /obj/item/ammo_box/magazine/internal/cylinder
 	origin_tech = "combat=3;materials=2"
@@ -28,6 +29,8 @@
 
 /obj/item/gun/projectile/revolver/attackby(obj/item/A, mob/user, params)
 	. = ..()
+	if(istype(A, /obj/item/ammo_box/b357))
+		return
 	if(.)
 		return
 	var/num_loaded = magazine.attackby(A, user, params, 1)

code/modules/research/designs/autolathe_designs.dm

@@ -784,12 +784,12 @@
 	build_path = /obj/item/ammo_box/foambox/sniper/riot
 	category = list("hacked", "Security")
 
-/datum/design/a357
+/datum/design/b357
 	name = "Ammo Box (.357)"
-	id = "a357"
+	id = "b357"
 	build_type = AUTOLATHE
 	materials = list(MAT_METAL = 30000)
-	build_path = /obj/item/ammo_box/a357
+	build_path = /obj/item/ammo_box/b357
 	category = list("hacked", "Security")
 
 /datum/design/c10mm