FFFg will also increase barrel pressures a little more then the FFg. So keep that in mind when you work up loads. While the difference is not all that great, there is a difference. Start your loads about 10% less then what you normally would have with the FFg grade.
I bought fffg triple 7 by mistake,shooting Barnes SBT 245 gr. group was at 100 yards 5/8" for 3 bullets group.
The only problem I found with fffg,they react to humidity,and just the primer start after a second primer it fired on.
Could I mix fffg with ffg to use it or discard it?
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