I can't see blaming Bore Butter for guns that weren't properly cleaned or for turning guns into rust buckets.
Bore Butter can actually help dissolve residue and hard deposits that are left behind after a person has cleaned their barrel but has not cleaned it well enough to prevent rust.
After cleaning a gun and applying Bore Butter, I've often gone back after 1-3 days and swabbed the bore to find traces of residue that Bore Butter has helped to loosen up and dissolve.
It's only an indication that the fouling wasn't all removed the 1st time.
A 2nd application of Bore Butter and a recheck might loosen up even more residue.
Bore Butter contains mineral oil which is recognized as a rust preventative and is also an ingredient in Ballistol.
But TC never claimed that Bore Butter was a cleaner or a neutralizer of corrosive powder fouling.
Sure, there are better products than Bore Butter to prevent rust, but at least it stays in place and doesn't run once applied.
Here's some relevant info. about Ballistol:
Ballistol (meaning 'Ballistic
Oil') is a mineral
oil-based chemical which advertises that it has many uses. It was originally intended for cleaning, lubricating, and protecting firearms.--->>>
https://en.wikipedia.org/wiki/Ballistol
Ingredients
(according to a specification from December 2002)
- pharmaceutical white oil: CAS RN 8042-47-5
- Oleic acid: CAS RN 112-80-1
- C-5 alcohols: CAS RN 78-83-1; CAS RN 137-32-6; CAS RN 100-51-6
- different essential oils to perfume Ballistol
-------------------------------------
"The Decomposition of Ballistol
........The components
contained in
Ballistol decompose in the following fashion:
Mineral Oil (Liquid Paraffin) Most paraffin-based lubricants
contain a dirty or even chlorinated paraffin, which
is toxic and has a tendency to gum up and harden........"
Quoted from the Ballistol MSDS:--->>>
http://www.ballistol.com/wp-content/uploads/2013/09/MSDS_TECH_BIO.pdf