Similar but not at all the same!
I had a friend that was tired of the fouling build up, when shooting Black Powder at Cowboy shoots. SASS rules require a minimum of 15 grains for Black Powder classes, so that all shooters have a cloud of smoke to contend with! My friend would use WSP (primers) 15 grains of FFFg the put the 1/4" thick block of paraffin over the case, and seat or crush a plug of wax into a case. Then seat a 158 gr RBFP bullet. Without the wax that is a very standard 38 special load, but with the wax it needs a 357 case to hold everything.
With SASS rules, you only load 5 in a revolver, so after a string of 5 shots, he would have paraffin dripping out of the barrel, often for 10 or 15 seconds, The inside of that pair of holsters were a mess too!
He always used the "Gun soup" method of cleaning, take the grips off and place your revolver(s) in a pail of boiling water. This removed the wax and Black Powder residue very well.
Ivan