has anyone experience with this powder?especially in 475linebaugh or 480 ruger and 44magnum?

BEWARE! SR4759 or SR4756? There are two and the names are that close... The 4759 is an OLD rifle powder. IMR has data. The 4756 is a slow shotgun powder useful in magnum pistol loads. Used mine up shooting .357 long ago... Again, I would hit the IMR data and start there. Hodgdons also takes email questions. Another very good source. luck.

4759 is a great powder and I use it in a lot of guns. However, I think it is too bulky for the revolver cartridges. It would shoot OK but velocities might be low. I never tried it though.
I even use it in the 7BR and 7R for super accuracy and it shines in the 45-70 revolver.
Be worth a try, let us know how it does.

I've shot SR4756, under cast bullets, in my 44 Mag. and 41 Mag. revolvers, for years. It is very consistant but a little dirty.
I used SR4759 in a Witchita pistol chambered in 308 for reduced Sil. loads.