Any of you ol' long-timne reloaders care to take a moment to give this neophite some of your sage advice? It would certainly be appreciated, 'cause right now I'm feeling kinda stupid!
1)Double check your crimp.
Take the barrel out of your gun, and drop a loaded round in the chamber. It should drop in freely. If it doesn't, try screwing down the crimp die a bit (say, 1/4 turn).
2)Check your seating depth.
Are the bullets engaging the rifling (gun won't go completely into battery, will be hard to rack the slide to clear the jam, may be marks on the bullet from the rifling.)? If so, you need to seat a bit deeper.