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Bill in NM · February 7, 2000, 04:14 PM

Here's the deal. My brother is shooting and reloading for his Sig P239 in .40 S&W. Load is 4.2 gr of Win 231 (this is starting load in Lymans 47th edition) behind a 200 gr Gold Dot (if I remember right), using Federal primers. The problem is that it is definately flattening the primers. He tried 4.0 gr. of W231, and it wouldn't even cycle the action. No other signs of overpressure, but he is very concerned. Factory ammo does not have this problem. He's using a mild taper crimp, and it fits fine into the headspace and OAL gauge. Any ideas as to what's happening here?
Thanks,
Bill

February 7, 2000, 04:14 PM	#1
Bill in NM Member Join Date: January 21, 2000 Posts: 95	Here's the deal. My brother is shooting and reloading for his Sig P239 in .40 S&W. Load is 4.2 gr of Win 231 (this is starting load in Lymans 47th edition) behind a 200 gr Gold Dot (if I remember right), using Federal primers. The problem is that it is definately flattening the primers. He tried 4.0 gr. of W231, and it wouldn't even cycle the action. No other signs of overpressure, but he is very concerned. Factory ammo does not have this problem. He's using a mild taper crimp, and it fits fine into the headspace and OAL gauge. Any ideas as to what's happening here? Thanks, Bill