The Nordman 265/70R17 Winter tires read 47 psi maximum pressure.
At 45 psi the footprint still looks the same as Ford’s 35 psi cold inflation pressure.
(But I have not made ink footprints.)
When deep snow storms are arriving, I could let air out. Should it be to 35 psi?
You’re running winter tires at 45 PSI? Wow, just wow.
If you’re going to encounter a fair amount of snow-covered roads, you want all the tire on the road you muster, 25 PSI or maybe even lower would be okay if the conditions were bad enough. At most you should be running 35 PSI.