Just finished up an upgrade to my new Colt .38 Super Combat Commander after getting it back from my gunsmith who installed an Ed Brown ambi safety and extended mag release. He checked it for proper feeding in case it needed a throat & polish job.
He made up some wadcutter .38 Super rounds and it fed them 100% so it should feed everything I want to run through it.
I took out the OEM double recoil spring set-up and went with a Ed Brown 2-piece full-length guide rod with Wolff 16 lb. recoil spring.
Off to the range with it this next week.