30-06 blowback

handofzeus

CGN Ultra frequent flyer
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Well, tried my first 165gr hardcast lead reloads with a 27gr charge of H4895. Quite a few blowbacks!Thought it might be headspacing, but shot a couple factory rounds with no issue. Is this a case of too low a pressure to fully seal the chamber? I know I can bump the load a bit, but I really fear barrel-leading as these bullets are unchecked. Also thinking of adding 1-1.5gr of titegroup just as bit of catalyst to the slower powder!
 
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