gday, a bit late to the party.
i shoot a 375 BB now an then for sambar deer here in Aus.
lately its been with a 245gr hard cast commercial boolit , i load mine down but warmer than 38-55 as its pretty lively at full power..
more of a novelty i guess these days -
accuracy improved with a williams peep sight set up over the factory buckhorns.... out to 100m pretty good, the bush dictates how far ya can get a shot off, sometimes the bead obstructs the target etc...
good round though when used right-- not the powerfullest by any means.