The attached first chart may be a way of blending test performance and field results into something useful. Ron shared some field experience, along with test data for the .44/270 Speer Deep Curl. I've had a mix of experiences with this bullet as well. So, I tried to put it in a visual. It shows the 50 grain BH load as "poor" with 80 as "good", then shows various field experience points as good or poor.

This suggests a "max range" for these intermediate power loads of something over 125 yards, but less than 150. It may suggest that harder targets (larger bucks) are better for the longest ranges than softer targets like small does.

My "poor" field experience was at the closest range (105 yards), but on a small doe that may have field dressed 100 lb. Was hunting a doe tag and this small doe with 2 fawns seemed like she may have been wounded by nearby gunfire. What looked like a wound turned out to be a wet mud patch behind her shoulder. The bullet made a long path through the rib cage on a quartering away downhill shot. The deer went over 200 yards, then had to be put down with a finish shot over an hour later. The bullet had penciled through.

"How much powder?", is asked in this thread. The first chart may start answering "how far" for intermediate 80 - 90 grain BH209 loads. The 2nd chart shows load equivalents for some other powders, with this 270 grain bullet. The 50 grain equivalents look suspicious and may represent extrapolating data too far. The 80 grain equivalents should be better and of more interest for hunting loads.