Manufacturers alway face liability lawsuits, so they tend to promote on the conservative side of loads. If one is making lots of money in manufacturing, he/she is a prime target for aggressive lawyers. IMHO.
Why do you suppose firearms have caution messages on the frame and/or barrel?:banghead:
The idea of the filler is to position the ball closer to the forcing cone of the barrel, which would put the ball just under the face of the cylinder to allow cylinder rotation. This position reduces the deforming of the ball when it enters the forcing cone, than if the ball were an inch or so away from the forcing cone of the barrel. The filler also allows the shooter to use reduced loads instead of full-power loads.
If one is using a filler, first, load the measured charge, 30 grains for example. Then, take your filler (cream of wheat, cornmeal, etc.) and pour it in the revolver or removed cylinder. How much to pour in?
Experiment by pouring the filler into the cylinder about 3/4 up, then seat the ball and see how far down the ball sits in the cylinder. On the next load of filler, pour in a little more than 3/4 full. Eventually, you will arrive at an amount that allow the ball to seat just below the cylinder face. Too much filler will not allow the ball to seat below the cylinder face, so, take it easy on the loading. The filler will only compress so much. I like using a cylinder press like Powder, Inc sells.(
www.powderinc.com)
When you have figured out how much filler is needed to place the ball correctly, make a filler scoop, using a cut-down 45-70 case, for example. Last step is to add a smear of grease on top of the balls. Using wads AND filler is counterproductive.
It is more labor-intensive, however, one advantage is twice the number of loads out of the same can of 3FG black powder. Thirty grains will carry that ball about a hundred yards, and with less recoil. Can't speak for SASS, but competition NMLRA line shooters have using this method for decades, winning national & state championships and getting their name in the record books.
Someone said, "If you load 60 grains, you need ear plugs and ear muffs to protect your hearing."
Whether shooting 20 grains in a Remington New Model Army or 60 grains in a Walker, everyone should be wearing hearing protection, ear plugs and/or ear muffs. Take it from one who didn't, starting out in the '60's, shooting thousands of rounds competing in N-SSA matches.
Now, I am "paying for that indisgression" by chucking out about $4,000 every five or six years for new hearing aids. I'd recommend hearing protection for shooting even .22 rimfire ammunition.