You may not get enough speed to effectively use (expand) the copper bullets like Barnes unless at close range. 6x45 works well with the 6mm varmint style bullets usually used in hot 243's and the likes, they work like normal hunting bullets at the slower speeds you are likely to get. Yes W748 or Hodgson H335 are a good start and CFE223 is another worth looking at for the 85-100gr weight.
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