Longbarrel50,
By now you should be seeing a pattern. Muzzleloaders, flintlock rifles especially, are like many cooks preparing cakes. We all know what the outcome should be, but we all have a different approach to achieve that end result. You'll find something that works for you, and that's what matters.
I like cutting patches at the muzzle (or, even better, using a ball-block) and I know the patch is always centered and exactly the right size and shape. As Roundball points out, a pre-cut can be centered just as well in the same amount of time. I've known guys who've spoiled a day's hunt by slicing their thumb near off with a patch-knife. Some folks just don't have good luck with sharp instruments.
Five shot groups are better for showing both the gun's abilities and your own, even though sometimes the results aren't pleasing.
Stumpy's Postulate to Murphy's Law: "The last shot taken will be the group spoiler."
To foul or not to foul? Wipe every shot? Depends greatly on what you require in accuracy and what lube you're using, tightness of ball/patch to barrel, rifling profile, temperature, humidity, a hundred other things. I've cooked up a lube that allows dozens of shots without the need to wipe, but accuracy suffers. So, for me, the convenience of three shots between wipes is working out with "pleasing" results on target. When I get in a match where there are eight "skeets" or gongs on a timed course, I ain't gotta wipe and that's great.
When I get ready for a hunt/shooting I wipe the bore with a dry cleaning patch, followed by a lightly lubed patch. This coats the bore evenly with lube. After every shot, the patched ball pushes the fouling down, also leaving a lightly lubed bore. This has resulted in less difference between a "cold" and a fouled bore for first shot point-of-impact. It also makes the gun easier to clean at the end of the day. :results: When you cook, you grease the pan first. Same principle.
Muzzleloading Tip #47: If you use a screw-on jag to hold a cleaning patch - poke a hole in one corner with a vent pick or patch knife and thread the jag onto the ramrod through that hole. You'll never loose the patch in the barrel that way.