Hi new guy with an old rifle. Best estimate is the rifle was built circa 1910-1920 and chambered for 8x48R Sauer. I am looking for a load for the 8,15x46R using Vihtavouri N130. I have data for N135 but I am reluctant to buy a Kg of powder I have no other use for. I already have the N130 for use in 45-70. The case capacity of the 8x48 and the 8,15x46 are very close so I am thinking I can extrapolate the data using case water-weight comparison. I have tried N140 but it seems a bit too slow and I get blackened cases....