Those are very nice OG.
If you have the manuals for them read them till you are comfortable with the information, if you have any questions send me a PM for my phone number and give me a call, I'm usually home anytime after 4pm CST.
If you don't have the manuals you can usually download them at the manufacturer's website.
I would suggest just ordering a limited number of Minie balls to start with till you see if shooting these rifles is something you enjoy, it's something of an acquired addiction, kinda like shooting 1911's if you know what I mean.
Here is one of the best places to get muzzle loading supplies...
http://www.trackofthewolf.com I would suggest getting this particular minie ball since it's very similar to if not identical to the minies used in the Springfields during the war...
http://www.trackofthewolf.com/Search.aspx?search=BALL-58-MINIE-OS%20You'll also need FFG grain size black powder, there are a number of different brands such as Goex, Swiss, and KIK but stay away from Elephant brand powder, it's a very good powder but the company that makes it has gone out of business and you don't want to work up a good load combination on a powder you can't get anymore.
I'd check the local gunshops for black powder, you may find one near you that stocks it.
I can't tell from the photo but your Springfields probably have percussion cap nipples for musket caps which you'll also need.
If all else fails you can get your powder and percussion caps here
http://www.powderinc.com/catalog/caps.htmI would suggest staying away from black powder substitutes like Pyrodex, again, there's nothing wrong with it but it tends to not be as consistent as real black powder. It also has a higher ignition temperature than real black which in turn increases the possible chances of a hang fire.
You're going to need a powder flask and a powder measure, I would suggest an adjustable measure like this one...
http://www.trackofthewolf.com/Categories/PartDetail.aspx/85/1/MAS-120A powder flask can be as plain or fancy as you like, they make a brass one that is good for display as well as being functional and they have simple ones that work well and are very low priced.
You should be able to find these at your local gunshop.
And get a tube of Borebutter to lube the minies with, just a little on the outside just before loading is all that's required.
I know I'm making this sound very elaborate and confusing but it really isn't.
The equipment is a one time purchase and will last a very long time with proper care.
The standard powder charge for the Springfield is 60 grains of powder.
Take the ramrod and insert it into the unloaded barrel, make a mark even with the crown of the muzzle, you'll understand why shortly.
You might even consider getting an aftermarket fiberglass or composite ramrod with a brass tip to keep the wear on the barrel down to nothing, the steel ramrod on the rifle will wear the muzzle after a while.
Run a couple of dry cleaning patches down the bore to remove any oil left from a previous cleaning (you can do this before you leave home going to the range).
Before you load the rifle, snap a couple of musket caps to clear any oil or moisture from the percussion cap nipple and flame port.
Point the muzzle towards some blades of grass when you snap the caps and observe the grass for movement which will indicate a clear ignition path, if you don't see movement, remove the percussion cap nipple and use a pipe cleaner to clean the flame port from the bolster into the barrel and replace the percussion cap nipple.
Retry snapping a musket cap to check the ignition path, if it's clear then you're good to go.
As a note, I've only had to clear the flash port once or twice when I used too much oil during a cleaning.
Take a minie ball and apply a small amount of Borebutter to the outside mostly in the grease grooves.
The Borebutter serves to lubricate the minie making it easier to load and more importantly for our purposes, it contains ingredients that keep the powder fouling soft.
You can set the minie aside for the moment.
The shooting is the easy part.
Pull the hammer back to the half cock position.
Adjust the powder measure to 60 grains and fill it from the flask, NEVER EVER!!! charge the rifle from the flask as a stray ember in the barrel can turn a flask into a hand grenade.
While keeping the muzzle pointed away from your face, pour the 60 grain charge into the barrel, hit the barrel with the heel of your hand a couple of times to settle the powder.
Remove the ramrod, place the lubricated minie in the muzzle and use the ramrod to seat the minie, the mark you made on the ramrod should be out of the muzzle about an inch and a half, that lets you know the minie is seated properly.
If it's much more than that and it won't go any farther, take the rifle to a gunsmith because something is obstructing the barrel.
Don't hammer the minie with the ramrod like you see in the old movies, that's Hollywood BS and doing so can damage the nose of the minie and drastically affect the accuracy, just a smooth push to load the minie and a light tap to seat it is all that's required.
At this point, while keeping the weapon pointed downrange place a musket cap on the nipple, bring the rifle to the ready, pull the hammer back to the full cock position and sight on the target.
From this point on it's just like every other iron sight rifle you've ever fired.
You probably won't notice any lag between the cap firing and the main charge going off and the recoil will be more of a push than a kick.
Now a couple of things to be aware of, the first couple of shots may not be very accurate as a musket barrel needs to be fouled for best accuracy, the fouling acts like a gas seal.
Muskets don't generally get fouled like muzzleloaders do that shoot patched roundball, the minie tends to clear much of the excess fouling from the previous shot.
Here's something else to be aware of, these rifles whether they are originals or reproductions, have a personality and once you learn that personality you will be amazed at how accurate they are.
Forget the massed fire pictures from the Revolutionary War and the War of 1812, once you are familiar with your particular rifle's quirks you'll find it can be deadly accurate at several hundred yards.
A trained marksman could consistently hit a man sized target at 400 yards.
Hope this has been of some help and feel free to call.
Jim