I rechambered a 1910 Ross to .303 Epps Improved. 56 gr of 4350 gave slightly over 2700 with a 174 Gr. Sierra Match King. I don't recommend that anybody do the same, but there were no excess pressure signs, and the cartridges ejected perfectly. In spite of the bolt controversy, the Ross is a strong rifle. Accuracy was about 3 inch groups, which is about my limit with iron sights.