C
chino69
Guest
I very rarely use safety glasses when I shoot, despite having easy access to them. I will now make them a basic part of my shooting due to an incident that occurred last evening while shooting.
I was still working up a load for my .243 A.I. using VV N560, Lapua brass, 95 grn. Nosler BT's, Federal primers, etc.. The only element that I varied was my seating depth as the charge selected was giving good results and I was 'fine tuning'. Toward the end of my session one of the rounds blasted a bit of gas past my face and a little debris. Upon extracting the case I saw a little hole alongside the primer pocket. When I de-primed the case, the primer had a split running in the axial direction, i.e.: parallel to the bore. Apparently the primer cup failed which allowed a gas cut to blow alongside the primer pocket of the case. None of the other primers showed any degree of flattening or hints of over pressure. In fact, I had gone past this charge during load development and was actually much lower (approx. 1.5 grns.) than I had been.
I'll try to post pictures later for clarity but I will always wear safety glasses from here on.
I was still working up a load for my .243 A.I. using VV N560, Lapua brass, 95 grn. Nosler BT's, Federal primers, etc.. The only element that I varied was my seating depth as the charge selected was giving good results and I was 'fine tuning'. Toward the end of my session one of the rounds blasted a bit of gas past my face and a little debris. Upon extracting the case I saw a little hole alongside the primer pocket. When I de-primed the case, the primer had a split running in the axial direction, i.e.: parallel to the bore. Apparently the primer cup failed which allowed a gas cut to blow alongside the primer pocket of the case. None of the other primers showed any degree of flattening or hints of over pressure. In fact, I had gone past this charge during load development and was actually much lower (approx. 1.5 grns.) than I had been.
I'll try to post pictures later for clarity but I will always wear safety glasses from here on.