308 win with 210gr RN GC

Coydog,

That is a pretty easy question to answer considering H4895 is the only powder recommended for reduced loads by the powder maker.

Hodgdon data shown 100% capacity load is safe for a 208 gr jacketed bullet with 38.8 gr at 2359 fps and a pressure of 58,600 psi.  Hodgdon pdf on reduced loads says H4895 can be loaded down to 1/2 available case capacity with no ignition or position sensitivity problems so you have the entire range of a casefull to a half a careful with a 210 gr bullet cast or not. It is just a matter of you picking the velocity you want and loading for it. There is no big deal about it, just use H4895 and a chronograph.

Math is the simple method for your question. I'd tackle this starting with the strength of your alloy in psi and follow Lee formula to find the load that matches the alloy strength by their instructions to find the maximum charge for your bullet alloy. Gas checks extend the pressure range of cast bullets an additional 10% You can sit with a calculator and figure your answer in no time with high school math.

The only advantage of pistol powders is cost. They have peaky pressures that aren't friendly to cast bullets. H4895 doesn't have peaky pressure and 1/2 case full is likely way lower than you want to go, but that is the beginning of it's range in your application.

Hodgdon's standard for reduced loads where H4895 is used is a 60% capacity load and that is considered a 150 yard Deer load. You likely will not be disappointed with that for Deer to 150 yards. It will take the strength of Lyman #2 alloy to match that load. The 60% load is 23.4 gr H4895. Start there and work up in 1% increments till you run out of accuracy. That is a standard procedure.

Gary