I am having a single shot rifle built in 9.5x74r (375x74r)as a second caliber. Does any one have any loading information? Dave at C&H tool who made the reloading dies told me his working load for his double rifle is a Speer 270 gr bullet and 74 gr of H414 power for about 2400 fps. Looking for more loads with other powders and bullets. Thanks RNB