Fixed all the runtimes.

code/modules/projectiles/projectile.dm

@@ -110,7 +110,7 @@
 
 	Bump(atom/A as mob|obj|turf|area)
 		if(A == firer)
-			loc = A.loc
+			//loc = A.loc
 			return 0 //cannot shoot yourself
 
 		if(bumped)	return 0
@@ -182,6 +182,7 @@
 			if(!istype(src, /obj/item/projectile/beam/lightning))
 				density = 0
 				invisibility = 101
+			//del(src)
 			returnToPool(src)
 		return 1
 
@@ -199,6 +200,7 @@
 		if(kill_count < 1)
 			//del(src)
 			returnToPool(src)
+			return
 		kill_count--
 		spawn while(src)
 			if((!( current ) || loc == current))

code/modules/projectiles/projectile/beams.dm

@@ -206,6 +206,9 @@ var/list/beam_master = list()
 				return
 			step_towards(src, current) //Move~
 
+			if (isnull(loc))
+				return
+
 			if(kill_count < 1)
 				//del(src)
 				returnToPool(src)