Yes I hunted with .338 whisper for years, aka .338 BR. You can use ADI 2207 and 160gr TTSX or 180gr Nosler BTs for a faster load with good killing performance. I'd have to go back through some old loading notes to give you the load but from memory it was about 26gr. I'll have a look tonight.
I know where there is old stock of the 160gr TTSX if you are interested. Took many deer and goats with mine.
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