According to Frank de Haas's book the CF2 action was the same length from 222 to 300mag. I had a late model and it was disappointingly the same I think. Mine was in 222 and had a big spacer in the mag.
Another place to look (google) is here http://www.airgunspares.com/store/content/87/BSA/ but this list only defines the early Hunter models by action length. Maybe because the CF2s are not defined you can assume de Haas is correct. I am sure a BSA wizard will confirm though.
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