9.3x74R Contradictory Data

[diemaco]

Anyone using H380 in the 9.3x74R?

Hodgdon online data and Speer manual had vastly different data. I split the difference and loaded in the middle of the two (I find Speer data to be on the conservative side), but my first few loads already hit 2300fps, no pressure signs.


I fired the next two 1/2gr increments, which started to approach 2400fps, and I called it quits. Going to have to pull some rounds and do more investigation around 59.5gr of powder.

Today at lunch I stumbled on the Speer website, and was surprised to see even lower charges.

What loads are you guys using?

 

[4fifty8]

IMR 4064 with 250gr TTSX good accuracy.

 

[maynard]

I tend to use the powder manufacturers data over bullet manufacturers data as a starting point.

 

[diemaco]

I tend to use the powder manufacturers data over bullet manufacturers data as a starting point.

I typically do too, especially Speer as I find them conservative. In this case I find it odd that the NEW Speer loads are even lower than the old Speer data

 

[keith mokry]

285 privi with imr 4350 for 2350fps. I can’t remember load at moment. I did load it hair over 2400fps. This with 231/2” brl

 

[track]

I use VV-165 behind a 250 grain Nosler Accubond in my double rifle. Velocities are at 2,400 fps.

 

[howard2]

The Lee book has someone's data to compare, not sure who. Both Norma and the Ladeboken has lots of load data but mostly Norma or Vihtavuori powder.