Greetings @30.06king,
I do understand the question but have to wonder what difference it makes. The Ross action is straight pull so its ability to chamber and extract tight ammunition is limited. This was reported as a problem in 1915 in battlefield mud. None of this should be a problem in hunting or casual target shooting provided pressure are kept in normal ranges. Both the .280 Ross and .303 cartridges are quite tapered that aid extraction and Ross military rifles often have chambers cut on the large side to aid chambering.
The Ross rifles were at their best as target and sniper rifles where accuracy was King.
Regards Grandpamac.
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