it compiles, that's better than it not compiling, right?

code/modules/projectiles/ammunition/_ammunition.dm

@@ -80,6 +80,6 @@
 	pixel_y = rand(-12, 12)
 	var/turf/T = get_turf(src)
 	if(still_warm && T && T.bullet_sizzle)
-		addtimer(CALLBACK(GLOBAL_PROC, .proc/playsound, src, 'sound/items/welder.ogg', 20, 1), bounce_delay) //If the turf is made of water and the shell casing is still hot, make a sizzling sound when it's ejected.
+		addtimer(CALLBACK(GLOBAL_PROC_REF(playsound), src, 'sound/items/welder.ogg', 20, 1), bounce_delay) //If the turf is made of water and the shell casing is still hot, make a sizzling sound when it's ejected.
 	else if(T && T.bullet_bounce_sound)
-		addtimer(CALLBACK(GLOBAL_PROC, .proc/playsound, src, T.bullet_bounce_sound, 60, 1), bounce_delay) //Soft / non-solid turfs that shouldn't make a sound when a shell casing is ejected over them.
+		addtimer(CALLBACK(GLOBAL_PROC_REF(playsound), src, T.bullet_bounce_sound, 60, 1), bounce_delay) //Soft / non-solid turfs that shouldn't make a sound when a shell casing is ejected over them.

code/modules/projectiles/guns/ballistic.dm

@@ -63,7 +63,7 @@
 					playsound(src, "gun_insert_full_magazine", 70, 1)
 					if(!chambered)
 						chamber_round()
-						addtimer(CALLBACK(GLOBAL_PROC, .proc/playsound, src, 'sound/weapons/gun_chamber_round.ogg', 100, 1), 3)
+						addtimer(CALLBACK(GLOBAL_PROC_REF(playsound), src, 'sound/weapons/gun_chamber_round.ogg', 100, 1), 3)
 				else
 					playsound(src, "gun_insert_empty_magazine", 70, 1)
 				A.update_icon()

code/modules/projectiles/guns/energy/kinetic_accelerator.dm

@@ -39,7 +39,7 @@
 	if(!QDELING(src) && !holds_charge)
 		// Put it on a delay because moving item from slot to hand
 		// calls dropped().
-		addtimer(CALLBACK(src, .proc/empty_if_not_held), 1.60)
+		addtimer(CALLBACK(src,PROC_REF(empty_if_not_held)), 1.60)
 
 /obj/item/ammo_casing/energy/kinetic/premium
 	projectile_type = /obj/item/projectile/kinetic/premium
@@ -138,7 +138,7 @@
 	if(!QDELING(src) && !holds_charge)
 		// Put it on a delay because moving item from slot to hand
 		// calls dropped().
-		addtimer(CALLBACK(src, .proc/empty_if_not_held), 2)
+		addtimer(CALLBACK(src,PROC_REF(empty_if_not_held)), 2)
 
 /obj/item/gun/energy/kinetic_accelerator/proc/empty_if_not_held()
 	if(!ismob(loc))
@@ -169,7 +169,7 @@
 		carried = 1
 
 	deltimer(recharge_timerid)
-	recharge_timerid = addtimer(CALLBACK(src, .proc/reload), recharge_time * carried, TIMER_STOPPABLE)
+	recharge_timerid = addtimer(CALLBACK(src,PROC_REF(reload)), recharge_time * carried, TIMER_STOPPABLE)
 
 /obj/item/gun/energy/kinetic_accelerator/emp_act(severity)
 	return

code/modules/projectiles/guns/misc/beam_rifle.dm

@@ -268,7 +268,7 @@
 	if(istype(user))
 		current_user = user
 		LAZYOR(current_user.mousemove_intercept_objects, src)
-		RegisterSignal(user, COMSIG_MOVABLE_MOVED, .proc/on_mob_move)
+		RegisterSignal(user, COMSIG_MOVABLE_MOVED,PROC_REF(on_mob_move))
 		listeningTo = user
 
 /obj/item/gun/energy/beam_rifle/onMouseDrag(src_object, over_object, src_location, over_location, params, mob)

code/modules/projectiles/guns/misc/medbeam.dm

@@ -53,7 +53,7 @@
 	current_target = target
 	active = TRUE
 	current_beam = new(user,current_target,time=6000,beam_icon_state="medbeam",btype=/obj/effect/ebeam/medical)
-	INVOKE_ASYNC(current_beam, /datum/beam.proc/Start)
+	INVOKE_ASYNC(current_beam, TYPE_PROC_REF(/datum/beam,Start))
 
 	SSblackbox.record_feedback("tally", "gun_fired", 1, type)
 

code/modules/projectiles/projectile/energy/net_snare.dm

@@ -37,7 +37,7 @@
 			if(com.power_station && com.power_station.teleporter_hub && com.power_station.engaged)
 				teletarget = com.target
 
-	addtimer(CALLBACK(src, .proc/pop, teletarget), 30)
+	addtimer(CALLBACK(src,PROC_REF(pop), teletarget), 30)
 
 /obj/effect/nettingportal/proc/pop(teletarget)
 	if(teletarget)

code/modules/projectiles/projectile/magic.dm

@@ -387,8 +387,8 @@
 /obj/structure/closet/decay/Initialize()
 	. = ..()
 	if(auto_destroy)
-		addtimer(CALLBACK(src, .proc/bust_open), 5 MINUTES)
-	addtimer(CALLBACK(src, .proc/magicly_lock), 5)
+		addtimer(CALLBACK(src,PROC_REF(bust_open)), 5 MINUTES)
+	addtimer(CALLBACK(src,PROC_REF(magicly_lock)), 5)
 
 /obj/structure/closet/decay/proc/magicly_lock()
 	if(!welded)
@@ -402,7 +402,7 @@
 
 /obj/structure/closet/decay/proc/decay()
 	animate(src, alpha = 0, time = 30)
-	addtimer(CALLBACK(GLOBAL_PROC, .proc/qdel, src), 30)
+	addtimer(CALLBACK(GLOBAL_PROC_REF(qdel), src), 30)
 
 /obj/structure/closet/decay/open(mob/living/user)
 	. = ..()
@@ -410,12 +410,12 @@
 		if(icon_state == magic_icon) //check if we used the magic icon at all before giving it the lesser magic icon
 			unmagify()
 		else
-			addtimer(CALLBACK(src, .proc/decay), 15 SECONDS)
+			addtimer(CALLBACK(src,PROC_REF(decay)), 15 SECONDS)
 
 /obj/structure/closet/decay/proc/unmagify()
 	icon_state = weakened_icon
 	update_icon()
-	addtimer(CALLBACK(src, .proc/decay), 15 SECONDS)
+	addtimer(CALLBACK(src,PROC_REF(decay)), 15 SECONDS)
 	icon_welded = "welded"
 
 /obj/item/projectile/magic/aoe
@@ -506,4 +506,4 @@
 			return
 	var/turf/T = get_turf(target)
 	for(var/i=0, i<50, i+=10)
-		addtimer(CALLBACK(GLOBAL_PROC, .proc/explosion, T, -1, exp_heavy, exp_light, exp_flash, FALSE, FALSE, exp_fire), i)
+		addtimer(CALLBACK(GLOBAL_PROC_REF(explosion), T, -1, exp_heavy, exp_light, exp_flash, FALSE, FALSE, exp_fire), i)