D-man I loaded some reduced loads in my 458 and found some very inconsistant. I read an article about reduced loads in large bore British rifles. The author used 5 grs of polyester filler material on top of the powder. This holds the powder close to the primer and the loads became very consistant and the groups got a lot smaller. The polyester material is the white fluffy stuff you use in aquarium filters. You can get this stuff at any pet store that sells tropical fish. I do not know if it is blown out when you shoot or if it is consummed when the powder burns but I found no residue in the barrel from the polyester filler. You may want to try that.
D-man I loaded some reduced loads in my 458 and found some very inconsistant. I read an article about reduced loads in large bore British rifles. The author used 5 grs of polyester filler material on top of the powder. This holds the powder close to the primer and the loads became very consistant and the groups got a lot smaller. The polyester material is the white fluffy stuff you use in aquarium filters. You can get this stuff at any pet store that sells tropical fish. I do not know if it is blown out when you shoot or if it is consummed when the powder burns but I found no residue in the barrel from the polyester filler. You may want to try that.



























