papazip I have been loading for me 2 7-08s for over a year and the cases have been blackened at the neck from the beginning. Never had a problem with flattened primers though. I use a overall length gauge with bullet comparator and seat my bullets .030 back from overall length. I tried out 4 different loads yesterday, 2 of the 4 did real well. 120 gr sierra's did good especially with H4895 for a published MV of 3000fps. I have tried Hornady 139 BTSP with many different powders and my rifles just dont care for those. For my Model 7 hunting load I have found 140 gr nosler ballistic tip over 42 grs of varget. Now that I have tightened up my stock on my Ruger I will have to try some of the noslers thru that also. If there is anything more I can do to help, just ask..
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