Just did some hand loading for my Brno 600 7x57 today. It is very long throated for the heavier projectiles. I was using 140gr corelokts, Norma brass, Federal 210 primers and 2213sc powder. The projectiles were seated approx .284" inches into the case. 49.5gr was suppose to give 2700fps. I loaded 50gr and only got 2500fps. I can fit a bit more powder in so will probably work up to 53gr. Eventually I will probably try a 160 or 175gr projectile.
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