im getting ready to buy a freedom express 301blds but found out that the hitch weight is 950#'s and my truck,f-250 diesel srw,is only rated for 850#'s...is it too much over or will it be ok
It's possible, you may need to upgrade the hitch. You need to check the stamp (or sticker) on your hitch.
There are some class IV hitches, with receiver ratings below the tongue weight of that trailer. Here is a link to one of them. It has 800 lb dead weight and 1000 lb WD rating.
That trailer is close to 1000 lb unloaded tongue weight. I saw one with 980 lb advertised hitch weight. That one will be over 1000, before it gets off the dealer lot.