Welcome to GBO, Ernie...officially!!
There are several options that I'd do to insure you don't have stuck brass. Not shooting milsurp ammo is number one, and making sure the chamber and ammo are clean and dry is paramount. The cleaning was the first step, polishing the chamber would be the next.
My preferred method is with a bore mop with a patch wrapped around it and a good metal polish. Put the bore mop on the tip section of a 3-pc cleaning rod, chuck it up in a drill and polish for a few minutes adding polish frequently.
If that doesn't solve the problem, or if you just want to go ahead and R&R the ejector to make it easier to clean up after the polish job, polish the ejector and add a BB ahead of the ejector spring to increase spring tension. I like to use a small machine bolt ahead of the spring, use the head as a spacer, the bolt cut down to about 3/8" to fit inside the spring and act as a guide to help keep the spring straight in the ejector housing. The bolt has to be cut short enough to allow the ejector full travel.
Read the ejector to extractor conversion links in the FAQ to learn how to R&R the ejector.
If you still have problems with stuck brass, you may have a defect in the chamber that will require you to send the rifle to H&R for repair. If that is the case, contact them and ask that it be repaired on their dime to cover shipping costs, their toll free number is in the FAQ also.
Hope this helps,
Tim