Remington and Winchester were big companies with a lot of products. There are at least two Winchester collector associations. I was a member of the
Winchester Club of America for seven or eight years and there was never a word about either of my interests, Model 12/42 and Model 71 in their publication.
Remington has the
Remington Society of America --
https://www.remingtonsociety.org/
I've attended four of their annual seminars over the years and they always have their annual meeting in conjunction with the Winter Las Vegas show. At these events I've usually been able to find at least a couple of members interested in the same things I am!!