I've not used it at 300 yards. Sub your 200gr Hornday in.
I got it from an article that John Barsness did. He used 52grs of TAC for 200gr bullets. If you look at TAC data for the 338 Federal, you'll see they get about 2700fps with 200gr bullets, so it stands to reason that you can sling like weight bullets at least as fast, if not faster from the 358, which is 51grs for me.
Not compressed in the least.
