Here is something I found,
http://stevespages.com/308p_6.html
I have gleaned it for the powders and bullets I like:
Disclaimer: If you use this and blow yourself up thats' on you. For informational purposes only... bla bla bla.
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300 whisper data
bullet powder start max
110 2400 14.1 17.1
110 H110 16.3 20.4
110 Lil Gun 16.3 20.4
110 296 16.6 20.3
125 2400 15 16.3
125 H110 14.9 19
125 Lil Gun 14.9 19
125 296 16.3 19
135 2400 15 16
135 H110 15.1 17.7
135 Lil Gun 15.1 17.7
135 296 15.6 17.9
150 2400 12.9 15.7
150 H110 13.5 17
150 Lil Gun 13.5 17
150 4227 14.4 17.4
150 296 13.2 17
168 2400 11.4 15
168 H110 11.6 15.6
168 Lil Gun 11.6 15.6
168 4227 13 15.9
168 296 11.6 15.7
175 2400 10.5 14.6
175 H110 11.4 14.5
175 Lil Gun 11.4 14.5
175 4227 11.4 15
175 296 10.9 14.9
190 2400 10.5 14
190 H110 11 14
190 Lil Gun 11 14
190 4227 12.3 14.3
190 296 11.3 14.6
200 2400 10.7 13.1
200 H110 10.7 13.2
200 Lil Gun 10.7 13.2
200 296 10.6 13.8
220 2400 10 12.3
220 H110 9.9 12.4
220 Lil Gun 9.9 12.4
220 296 9.8 12.7
240 2400 9.4 11.3
240 H110 9.6 11.5
240 Lil Gun 9.6 11.5
240 296 9.3 11.3
Threaded Mode