Ive been doing a bit of research on them myself. The guys running the GAP saums run low pressure loads in a long barrel to up the throat life, with the theory being that high pressure kills throats. Reckons 2000+ and still winning LR matches. So they say anyway.
Think they were loading h-1000 and running around 3000fps. Probably in long 28"+ target barrels though.
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