Randy,
In the Hidden Costs... thread I brought up paper patching.
Here's an article I stumbled across online.
http://members.shaw.ca/bobschewe/It sounds like he's using some huge calibers (.54 and .58 ) and they're not inlines but the "technology" is certainly transferrable.
He's launching a 430 grain minie at >1600 fps! Thats 2600 ft-lbs. I would imagine that a .45 could throw something in the 250 to 350 class much faster.
Primer, powder, home-cast bullet, and a piece of paper. That should save a bundle of $. Unless you are stuck with the pellets. The only way to trim that cost is to go with loose powder or a Savage 10ML.
He mentions a book by Paul Mathews. Mr. Mathews has written another book called
The Paper Jacket that one followed the
Practical Paper Jacket.