Dan, these sorts of things often pop up with precarves and sometimes with kits. We've all fussed around such situations, and it's easier with a blank, in my experience. If I had a sense that the web between the barrel and the ramrod groove was too thick, or the nose cap too shallow, it'd consider a couple options, understanding that some may not work because of the wood that's been already shaped in the precarve.
Easiest would be to make a deeper nose cap, but I like them shallow! So then, if the web is thicker than I like, I would see whether inletting the barrel deeper could be done, or whether I could gradually and carefully deepen the ramrod groove until it fades right into the nose cap. Generally it's a little of this, a little of that.
You obviously have a lot of skill, as the fit and finish are really as good as one could hope for, and it's your first rifle! I think you're ready to step up to building from a blank in your next build. It's really helpful, as it forces the builder to make decisions and really understand how to position all the parts in relation to each other, how the furniture terminus architecture, etc. You did a fine job in so many ways. I find just inletting a buttplate on a precarve 3x as hard as on a blank. Having squared up surfaces makes some tasks much easier.