First off, glad to hear that your friend is all right. Although those scope kisses can be nasty, I am sure it will be a scar to remember. Just think of the energy that ramrod had. That powder charge, the projectile, and the weight of that ramrod. Talk about a big load in a rifle. Of course, that also shows the quality of the steel used in a Thompson Center Barrel. By the way, I know of many people that have sent their ramrods down range. He is not in some exclusive club.
As for the rifle, I would be very sure that the rifle is still true and fine. If the owner has any real doubt take it to a gunsmith and have it checked. Otherwise, since it is an Omega and you can look through the barrel, remove the breech plug, look through the barrel and examine it for any stress cracks inside and out. I am almost positive there are not. Then set the barrel on a known flat level surface and check to see there are no bows in the barrel. Roll the barrel back and fourth. It will show true most likly.
Cain's Outdoor
http://www.cainsoutdoor.com/cart/asp/catalog_index.asp sells a Super Rod that will replace that one.