My opinion is he is not denigrating the cartridge at all but the name associated with it, ie "Capstick". Basically synonymous with "Bullshitter".

Before anyone gets offended, he was a great story teller and I have very much enjoyed his writings, and from peoples personal experiences with him he seemed to be a very personable man as well, but his own stories of his own exploits were pretty much made up.

"Capstick" is one of the much debated themes on the internet, along with 'Sullivan', the killing power of a .45/70, and a few other topics.

If people want to debate all that again, go for it.