[Unclenick]

Ninosdemente,

If you are shooting a powder as slow as 4064, you only want heavier bullets. Otherwise you can get in some secondary pressures that can ring your barrel. The burn rate of 4064 is about like Varget (AR2208, sold in this country as Varget, was designed to compete with 4064), but it is less dense, making case filling more trouble. However, a long drop tube can pack it down quite a bit. The downside is, that makes it burn even more slowly.