This question has been creeping up on me for a while .My kids are grown up, and yes, I do seem to have time on my hands today...
The muzzle loading rifle users at my club predominantly use Enfield rifles. Both originals and reproductions are to be seen, and they generally seem to shoot some form of Minie bullet. They invariably use a loading funnel to place their carefully measured charge right at the breech end of the barrel - not a grain gets left in the rifling!
I have a ML rifle of a type that we won't be discussing. I have found that a hollow based REAL bullet works best for me. I too use a loading funnel, followed by short starter and ramrod. I used to think that the funnel was all about accuracy and consistency until a couple of months back I carelessly tipped my powder in without it. I decided to finish loading and take the shot. If I got a flyer, then at least I would know why.
I could feel things getting tight by the time I had finished with the short starter. I got it a few inches further before realising that I had finished shooting for the day...
It took a spanner and a big hammer to shift it. I was quite surprised by the experience as I had imagined that a reasonably snuggly fitting bullet with a square edge round its base would be able to push powder grains before it, just as it's supposed to deal with fouling.
Now I realise that there are some obvious differences between a REAL bullet and a PRB. I also realise that the use of a funnel is unlikely to be historically correct for a longrifle. (I had a brief but enjoyable vision of Hawkeye traipsing through the woods trying to avoid bending a thin 40 inch brass tube!) All the same, I keep on thinking about those very long, and in some cases very narrow barrels that you guys use - mine is 26"x .50 - and wondering just exactly why you "get away with it" and I didn't.
Any thoughts?
In a slightly different direction, I have noted several statements recently about the desirability of using tight fitting loads, possibly tighter than historical usage, in the pursuit of accuracy. Its a view that I'm inclined to accept myself.
Do you think it possible that using a funnel to keep powder out of the rifling might facilitate even tighter loads? Or would it all be one encumbrance too much?