I have got to agree with Steelhead. Unless you happen to be in a lead free zone it’s hard to beat the Partitions. My 307 Marlin rechamber is whitetail deadly with Slim’s favorite load of 40.0 grs. of 4064 under the 170 Speer.
Its interesting how things sometime just work out. The 40.0 grains of IMR 4064 filling the case with some compression, The Speer bullet being to right length and diameter to crimp easily, The Hot Core bullet being tough enough for the velocity and yet able to open up well on light frame deer. It all just sort of worked out.
The one powder which seemed to excel above others such as Hodgdon Varget, Alliant Reloder 15 and TAC was IMR 4007SC. Too bad about the recall as it has made the powder almost impossible to find.
IMR 4007SC seemed to be a moderate perform at a load density of 100% and when heavily compressed came into its own with high velocity and good accuracy. One of the easiest powder to compress I have worked with.
