Re: Cleaning the bore with a wire brush
When you say a wire brush, I assume you mean a bronze bore brush and not one of the stainless steel brushes, as I do not consider the stainless steel ones suitable for anything other than something like a chrome lined bore.
It also depends on your barrel - if you have something like a premium stainless barrel (Krieger, Bartlein, Brux, etc.) then going easier rather than harder is the order of the day because the internal finish of the bore on them is such you do not need much brushing.
I pretty much clean and brush after every range session but I do not brush a lot and I am very careful coming back through the crown area. Some do not like pulling a brush back through the crown, but I find it a pain (with some laziness built in there) to take the brush off each time, so I pull it back.
I guess the answer is, don't be afraid to use the brush, but keep it good and wet with solvent and you typically don't need to brush a lot.
Just my opinions on the matter for what they are worth.