Why weren't they more popular?
They are and have been popular for a long time,
The issue is that for nearly a decade Green Mountain has chosen to focus primarily on a different market.
They (GM) are doing well as a business and continue to flourish. There is little wrong with their muzzle loading specialty barrels now or in the past.
Like many large companies they have had management changes and modified their business approach.
It's simple business, they do well and are making more money serving the larger CF barrel market.
(period)
Now, I'll share a personal thought.
GM has served me well in the past with new and replacement barrels,,
They have chosen to abandon production of the items I need to support my hobby/passion, and that was a raw business decision by who ever or what ever is running that company.
Because of that, I'll be !@*%&@ if I'll ever spend another single cent buying another new GM barrel or one that will in any way support GM.
Don't get me wrong, If I find one that I need in good condition from a private party or one that been lost in a warehouse for years,, I'll grab it.
But if they ever start production again,, Well there ain't a snowball's chance in
, they'll ever get my money again!!
John