There are many ways to skin a cat. Your meticulous method of shooting and cleaning is not improper or in error. But I differ in opinion that it is necessary. Several people have approached me, while I have been shooting my c&b pistols at the range, and commented that they own c&b revolvers but do not use them because it is too much trouble to clean them.
When asked what their cleaning procedure is, they relate a method not to dissimilar from yours. When I tell them that I can clean my revolvers in less than 15 minutes, some of them are astonished, some dubious, and a couple thought my method too risky. Nonetheless, I have never had any rust in any part of my revolvers for as long as I have shot c&b pistols.
For reference this is my cleaning method for my Remington NMA revolvers. There has been some variation over the years but it has substantially been this way:
1. I take the cylinder out, drop in a small bucket of moose milk made with Ballistol.
2. I then dip the revolver in the same bucket just shy of the cylinder bolt and with a tooth brush I scrub the fouling off all surfaces. I dunk the revolver repeatedly while continuing to brush.
3. I shake off the excess fluid from the brush and scrub the back part of the frame.
4. Dry everything off, including a few shots from a can of compressed air.
I run a couple of dry patches down to the bore. Lube everything with Ballistol.
5. Scrub the cones on the cylinder with the tooth brush in the bucket of Moose Milk. I turn over the cylinder and take my Speed Mop, which has six wool mops, and pump fluid through all six cylinders at the same time in the Moose Milk. I run some dry patches through the cylinders dry with paper towels and shots from the can of compressed air. Lube with Ballistol and I am done.
I have been reusing the same bucket of moose milk for a while now and will continue to do so. This method is not original to me but has been related to me by CAS competitors who shoot their c&b pistols a lot more than I do and I shoot mine 3 to 4 times a week. But I have had a pistol in storage for several months that had no more done to them than what is detailed above, without any signs of rust externally or internally.