Sadly there are several on this forum that think their opinions and guestimates are the facts.
^^^ this exactly, not sure how many times I've posted a run down on how to use a CAT scale to set up a truck/trailer to tow properly. Starting with the '15 model year all Ram trucks towing/hauling numbers are based on SAE J2807 testing, numbers one can go right up to the line in the sand as there is already safety factor calculated in.
Agree, knowing numbers will allow for much more accurate responses. Every question that starts "I have X truck and a Y foot trailer that has a dry weight of Z" can't be answered with any authority. Everyone would be better served to at least load up truck with all people, gear, fluids, hitch, etc. and go weigh the axles. Provide those two numbers and the payload capacity (PC) and GVWR from the door jamb and the exact maximum trailer weight can be calculated and then you have to go to the Ram site to see if your result is over the rated max trailer weight.
However, It doesn't matter what the maximum towing weight is, the odds are very high that anyone with a 1500 or 2500 will max out on the limitation of what the tongue weight can be before reaching the max tongue weight associated with the max towing weight.
Example for my truck that just happens to potentially allow me to use my max trailer rating; my truck has a 3k pound PC. I generally have about 1k of weight in the truck based on CAT scale measurement so my remaining PC is 2k. My max trailer towing capacity is about 13k, and if I assume the tongue weight is 15% that equals 1,950 pounds, which means that if I properly distribute the weight in the trailer I am just under my 2k pound remaining PC. Now that I have established that, here is how I reverse calculate how much trailer I can tow. 2k pounds payload capacity / 15% tongue weight average = 13,333 max weight of trailer (about 333 pounds over my rated max trailer weight). BUT! This just uses the assumption of 15% of tongue weight to trailer weight. I couldn't just go buy any 13k trailer, I need to know fully loaded tongue weight of a properly loaded trailer and, yes, this means you should be taking all your gear, supplies, food, drinks, etc. and putting it in your prospective trailer if back-of-napkin preliminary calculations appear to show the potential trailer might be wrong for truck. What I mean is I wouldn't be doing that pre-loading for a 7k pound trailer but I might if I was looking at a 11k trailer with some dealer accessories that don't ever show in dry weight ratings.
So, when being asked about towing a trailer, no one will authoritatively answer the question without actual numbers. You might get! should be able to, I never have a problem, etc. But take those with a grain of salt.