I know this thread is from 2011 but I would like to thank those that contributed. I am setting up a m7 with a 20” tube in rem260 for my 80 year old dad. I’ve got a box of partitions and ballistic tips as well as IMR4064, varget, and h4350 and Norma brass in stock. I’m going to start with the 4064 and partitions based on the detail you all provided above. A set of dies is all that’s left to obtain. Thanks again this was helpful
