I've been reloading RL-17 for a few months now in my 308. Its good with heavy bullets, but is not the fastest. N550 kicks the #### out of it in terms of achievable velocity (and group size) in my 308. However, I will probably be sticking with it since N550 doesn't have that great of temperature stability. RL-17 is only giving me marginal velocity over Varget with 190 SMKs, but it also groups a bit better.
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