Digger,
I’m learning that there are few things that can’t be reworked on a long rifle. For example, you could re-inlet the ramrod pipes after deepening the RR groove. If barrel lugs are in the way, you can file those down too. You might need to plug some holes and redrill. Lord knows I’ve done that many times.
It looks like you have enough wood on the side panels to feather the transitions. Look at the examples and follow the advice of experts here. I’m also learning to set my ego aside, eating a big bite of humble pie, and not getting set on anything I’ve already done. If it’s wrong, I try my best to fix it. Sometimes that is many re-dos.
That said, at some point I also call calf rope. I’m not good enough yet to get it any more “right.” I do want a functioning rifle, after all!
Instead of chucking the RR in the lathe, try scraping. I just use a sharp knife on ram rods. Kind of a feel thing for me.
Good advice here that should keep you busy!
Regards,
Paul