I have a Model 70 Super Grade (South Carolina) in 257 Roberts and I shoot the 110 grain Accubonds in front of 47.1 grains of 100V. It will touch three bullet at 100 yds when I do my part. I have never run it over the Magneto V3 so I can't quote velocity. 100V is suppose to be temp sensitive but I only use this on pronghorn and plains deer so temperature isn't a factor.
