diff --git a/code/__HELPERS/mob_helpers.dm b/code/__HELPERS/mob_helpers.dm
index 659c379453d..cda36557525 100644
--- a/code/__HELPERS/mob_helpers.dm
+++ b/code/__HELPERS/mob_helpers.dm
@@ -392,7 +392,7 @@
  *	This will create progress bar that lasts for 5 seconds. If the user doesn't move or otherwise do something that would cause the checks to fail in those 5 seconds, do_stuff() would execute.
  *	The Proc returns TRUE upon success (the progress bar reached the end), or FALSE upon failure (the user moved or some other check failed)
  */
-/proc/do_after(mob/user, delay, needhand = 1, atom/target = null, progress = 1, list/extra_checks = list(), use_default_checks = TRUE)
+/proc/do_after(mob/user, delay, needhand = 1, atom/target = null, progress = 1, allow_moving = 0, must_be_held = 0, list/extra_checks = list(), use_default_checks = TRUE)
 	if(!user)
 		return FALSE
 	var/atom/Tloc = null
@@ -402,8 +402,9 @@
 	var/atom/Uloc = user.loc
 
 	var/drifting = FALSE
-	if(!user.Process_Spacemove(0) && user.inertia_dir)
-		drifting = TRUE
+	if(!allow_moving)
+		if(!user.Process_Spacemove(0) && user.inertia_dir)
+			drifting = TRUE
 
 	var/holding = user.get_active_hand()
 
@@ -429,12 +430,15 @@
 		sleep(1)
 		if(progress)
 			progbar.update(world.time - starttime)
+		if(!allow_moving)
+			if(drifting && !user.inertia_dir)
+				drifting = FALSE
+				Uloc = user.loc
+			if((!drifting && user.loc != Uloc))
+				. = FALSE
+				break
 
-		if(drifting && !user.inertia_dir)
-			drifting = FALSE
-			Uloc = user.loc
-
-		if(!user || user.stat || (!drifting && user.loc != Uloc) || check_for_true_callbacks(extra_checks))
+		if(!user || user.stat || check_for_true_callbacks(extra_checks))
 			. = FALSE
 			break
 
@@ -442,6 +446,11 @@
 			. = FALSE
 			break
 
+		if(must_be_held)
+			if(target.loc != user)
+				. = FALSE
+				break
+
 		if(needhand)
 			//This might seem like an odd check, but you can still need a hand even when it's empty
 			//i.e the hand is used to pull some item/tool out of the construction
@@ -456,7 +465,7 @@
 		qdel(progbar)
 
 /// A version of do_after that will not get cancelled by a mob moving, for situations when signals are not viable
-/proc/moving_do_after(mob/user, delay, needhand = TRUE, atom/target = null, progress = TRUE, list/extra_checks = list(), use_default_checks = TRUE, must_be_held = TRUE)
+/proc/moving_do_after(mob/user, delay, needhand = TRUE, atom/target = null, progress = TRUE, allow_moving = 0, list/extra_checks = list(), use_default_checks = TRUE, must_be_held = TRUE)
 	if(!istype(user))
 		return FALSE
 	var/atom/target_loc = null
@@ -514,7 +523,7 @@
 
 #define DOAFTERONCE_MAGIC "Magic~~"
 GLOBAL_LIST_INIT(do_after_once_tracker, list())
-/proc/do_after_once(mob/user, delay, needhand = 1, atom/target = null, progress = 1, attempt_cancel_message = "Attempt cancelled.")
+/proc/do_after_once(mob/user, delay, needhand = 1, atom/target = null, progress = 1, allow_moving, must_be_held, attempt_cancel_message = "Attempt cancelled.")
 	if(!user || !target)
 		return
 
@@ -524,7 +533,7 @@ GLOBAL_LIST_INIT(do_after_once_tracker, list())
 		to_chat(user, "<span class='warning'>[attempt_cancel_message]</span>")
 		return FALSE
 	GLOB.do_after_once_tracker[cache_key] = TRUE
-	. = do_after(user, delay, needhand, target, progress, extra_checks = list(CALLBACK(GLOBAL_PROC, GLOBAL_PROC_REF(do_after_once_checks), cache_key)))
+	. = do_after(user, delay, needhand, target, progress, allow_moving, must_be_held, extra_checks = list(CALLBACK(GLOBAL_PROC, GLOBAL_PROC_REF(do_after_once_checks), cache_key)))
 	GLOB.do_after_once_tracker[cache_key] = FALSE
 
 /proc/do_after_once_checks(cache_key)
diff --git a/code/modules/projectiles/ammunition.dm b/code/modules/projectiles/ammunition.dm
index 85f116e7faf..a0d25ee80a1 100644
--- a/code/modules/projectiles/ammunition.dm
+++ b/code/modules/projectiles/ammunition.dm
@@ -50,8 +50,10 @@
 	return
 
 /obj/item/ammo_casing/attackby(obj/item/I as obj, mob/user as mob, params)
-	if(istype(I, /obj/item/ammo_box) && !istype(I, /obj/item/ammo_box/magazine/wt550m9))
+	if(istype(I, /obj/item/ammo_box))
 		var/obj/item/ammo_box/box = I
+		if(box.slow_loading)
+			return
 		if(isturf(loc))
 			var/boolets = 0
 			for(var/obj/item/ammo_casing/bullet in loc)
@@ -127,9 +129,10 @@
 	var/multi_sprite_step = AMMO_MULTI_SPRITE_STEP_NONE // see update_icon_state() for details
 	var/caliber
 	var/multiload = 1
+	var/slow_loading = 0
 	var/list/initial_mats //For calculating refund values.
 
-/obj/item/ammo_box/New()
+/obj/item/ammo_box/Initialize(mapload)
 	..()
 	for(var/i in 1 to max_ammo)
 		stored_ammo += new ammo_type(src)
diff --git a/code/modules/projectiles/ammunition/magazines.dm b/code/modules/projectiles/ammunition/magazines.dm
index 334e3ddfc44..8d027d3ba42 100644
--- a/code/modules/projectiles/ammunition/magazines.dm
+++ b/code/modules/projectiles/ammunition/magazines.dm
@@ -154,7 +154,7 @@
 	max_ammo = 6
 	multiload = 0
 
-/obj/item/ammo_box/magazine/internal/rus357/New()
+/obj/item/ammo_box/magazine/internal/rus357/Initialize(mapload)
 	..()
 	stored_ammo.Cut() // We only want 1 bullet in there
 	stored_ammo += new ammo_type(src)
@@ -259,6 +259,7 @@
 	max_ammo = 20
 	multi_sprite_step = 4
 	multiload = 0
+	slow_loading = 1
 	w_class = WEIGHT_CLASS_NORMAL
 	///A var to check if the mag is being loaded
 	var/being_loaded = FALSE
@@ -275,29 +276,19 @@
 	if(istype(A, /obj/item/ammo_box/wt550) || istype(A, /obj/item/ammo_box/magazine/wt550m9))
 		to_chat(user, "<span class='notice'>You begin to load the magazine with [A].</span>")
 		var/obj/item/ammo_box/AB = A
-		if(being_loaded == TRUE && double_loaded == FALSE)
-			double_loaded = TRUE //This will cancel ongoing reloads if made true by someone trying to do two reload processes at once
-			to_chat(user, "<span class='notice'>You're already loading the magazine!.</span>")
-			to_chat(user, "<span class='notice'>You stop loading the magazine with [A].</span>")
-		being_loaded = TRUE
 		for(var/obj/item/ammo_casing/AC in AB.stored_ammo)
-			if(double_loaded == FALSE)// checks to make sure double_loaded hasn't been made true while an ongoing reload is already ongoing
-				to_chat(user, "<span class='notice'>You stop loading the magazine with [A].</span>")
-				double_loaded = FALSE
-				break
 			if(length(stored_ammo) >= max_ammo)
 				to_chat(user, "<span class='notice'>You stop loading the magazine with [A].</span>")
 				break
-			if(!moving_do_after(user, 0.5 SECONDS, target = src, use_default_checks = TRUE))
-				to_chat(user, "<span class='notice'>You stop loading the magazine with [A].</span>")
+			if(do_after_once(user, 0.5 SECONDS, target = src, allow_moving = TRUE, must_be_held = TRUE, attempt_cancel_message = "<span class='notice'>You stop loading the magazine with [A].</span>"))
+				src.give_round(AC)
+				AB.stored_ammo -= AC
+				update_mat_value()
+				update_appearance(UPDATE_DESC|UPDATE_ICON_STATE)
+				AB.update_appearance(UPDATE_DESC|UPDATE_ICON_STATE)
+				playsound(src, 'sound/weapons/gun_interactions/bulletinsert.ogg', 50, 1)
+			else
 				break
-			src.give_round(AC)
-			AB.stored_ammo -= AC
-			update_mat_value()
-			update_appearance(UPDATE_DESC|UPDATE_ICON_STATE)
-			AB.update_appearance(UPDATE_DESC|UPDATE_ICON_STATE)
-			playsound(src, 'sound/weapons/gun_interactions/bulletinsert.ogg', 50, 1)
-		being_loaded = FALSE
 
 /obj/item/ammo_box/magazine/wt550m9/wtap
 	name = "wt550 magazine (Armour Piercing 4.6x30mm)"
@@ -319,9 +310,9 @@
 	icon_state = "46x30mmt"
 	ammo_type = /obj/item/ammo_casing/c46x30mm
 
-/obj/item/ammo_box/magazine/wt550m9/empty/New()
+/obj/item/ammo_box/magazine/wt550m9/empty/Initialize(mapload)
 	. = ..()
-	stored_ammo = list()
+	stored_ammo.Cut()
 	update_appearance(UPDATE_DESC|UPDATE_ICON)
 
 /obj/item/ammo_box/magazine/uzim9mm