Well, Sling, just how much IMR 4350 can you get into your 8X57mm cases? IF you can get significantly more in, you could try working up higher than 52 grains and see what the results might be. One-half grain at a time, or course, to be safe. All rifles are individuals, and although 52 grains with the 180-grain bullet might well be max. in Nosler's test rifle, yours might max out ata higher (OR LOWER) powder charge level.