Originally Posted by zcm82
I've had better luck with IMR4064 than anything else in 358 with 200 grainers. It isn't a scorcher for velocity, but the accuracy has been quite nice. 5 shot group from 100yds out of a 358 Win built on a 1909 Mauser.

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+1. Found several powders that shot faster with 200's, but I can't recall any that shot more accurately than IMR 4064 in my BLR.

MagMarc, are yours the SP or RN Core Lokts? I bought 500 of the SP's years ago and found while they are excellent performers, they aren't as accurate as the Sierra's or Hornadys and I've shot a lot of different powders with them. I ended up with a load using VV N135 that shot 5 around 2" at 100 yards.