How much Unique behind a 230 gr cast in 30-06?

[Jayhawkhuntclub]

I have a great load with 155 gr cast and 17.0 Unique. It's accurate, cheap to shoot and low recoil.
Now I'm looking for a 230 gr (TL309-230-5R). Thinking about starting around 15.0. Thoughts?

[Winger Ed.]

Something I've had great luck with is Red Dot.

In .30-06, I run a 170RN and a 190 SP.
Do a search for 'the load'. There's several extensive articles on it.

[Kosh75287]

When there's no guidance from a loading manual, I extrapolate from a load that is known to work. Like this:

17.0 gr Unique (155gr./230 gr.) = 11.457 gr. Unique.

I recommend that you round down to 11.0/Unique. This extrapolation works better with bullet weights that are closer together. Perhaps 11.0/Unique won't get the 230 gr. projectile out of the barrel, but erring on the side of lower pressures, at least initially, is usually your safest bet. If that occurs, I would expect that it is safe to try 11.5/Unique, and work up from there.

[Driver man]

15 grains of unique is in dangerous pressure area. I would start at 11.

[Geezer in NH]

I would buy a manual to start