My 6BR - last 26", 8t, ran 105s at 2850. Figure 8-12fps per 1" cut. BRX - 'ai' runs around 2950 in similar bbl. The 47 should run around 3,000-3050 in a 22-23" hunting rifle w/105s.

Above assumes safe accurate loads, not 'all out primer pocket loosening loads.'