Sound like your order of reassembly is wrong.
Starting with a field stripped 1911,
Install the barrel in the slide.
Install the recoil spring guide, put the recoil spring on, but leave the plunger off.
The spring just sticks out of the hole under the barrel for now.
Install the slide stop by holding the gun at an angle that is suitable for aligning the
swinging barrel link so the hole matches up to the slide stop hole. Place the slide stop
through the hole and barrel link, press it against the frame with your thumb, and work the action,
seating the slide stop fully. You'll know if you missed the hole in the barrel link.
Now put the plunger cap back on the recoil spring. Place the barrel bushing on the barrel,
rotate it as needed to allow clearance for the recoil spring and plunger, and push the plunger
in and rotate the barrel bushing to the locked position.
You never fight any springs in a 1911 until it's time to put the recoil plunger back into place,
at the end of the reassembly process. Many other guns require you to fight the recoil
spring just to reassemble the gun, but not a 1911.
CJ