Find out where reloder 17 fits into the burn chart, it's probably between Varget and H4350, find a load for one of the similar powders, start low and use a chronograph to confirm your pressures to yourself.
I still think 17 would be too quick for the cartridge, I was loading for a 7mm SAUM last year and was using H4831sc, I had a 300 WSM and used H4350. I still think re19, H4831,re22, powders in that range would be the best.