The 300WSM was an answer to a question no one asked.
If you try to load it up to 300WM speeds with 220 grain pills, you run into OAL issues.
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Well, that is why I am getting a 300 RUM built as a any distance, anywhere PG rifle. Also, don't need a 220 grain bullet, that rifle will have only one bullet for anything. A 200 grain bullet at 3,100 fps should take care of anything from a dik-dik to an eland.