Longshot,
Some books are fairly non-biased, but you can't trust a single magazine.
There is no 'Consumer Reports' for reloading,
And you can't usually get your product into a magazine unless you spend advertising dollars with that magazine.
Wasn't always this way, but with increased competition for advertising dollars and competition from internet, magazines simply won't waste space on something that doesn't generate revenue.
I know this first hand because of the engineering work I do for a hot rod parts company.
That company spent money in this or that magazine, then stopped, either for economic reasons, or they weren't seeing any interest in that particular sector of the market,
The magazines retaliated by not featuring a single vehicle with our logo on it, no matter what the accolades the owner had won.
It has gone so far that our logo on banners of event sponsors has been blacked out before pictures hit publication.
With internet forums, you still have to discount 'Fan Boys', or sponsored trolls talking up the banner of this or that, but you can glean some useful recommendations from other users. (it takes a LOT of time, but it can be done)
What I look for is someone that explains WHY they stopped using 'This' and started using 'That', and see if the recommendation fits my APPLICATION,
And not just touting a particular product because it's what THEY use and haven't tried anything else, or haven't used it long enough term or in high enough volume to find any faults.