Cal, I had a similar experience using H4831 in a 7mm magnum. I don't think it is the powder. My rifle made a click when I pulled the trigger at the rifle range and I figured the primer or firing pin was bad. When I extracted the case the powder spilled out into my magazine and shooting bench. I thought that the bullet was stuck in the rifleing. In fact the bullet was 6 inches deep into the barrel. I had to pound it out. The fellows to each side of me at the rifle range said they heard no pop or other indication that the primer had fired. The powder showed no indication of being burned but the bullet was stuck up the barrel. So I will leave it to the experts to tell be what happened. I have no explanation for it. The primer did fire but no ignition of the powder and that alone forced the bulled 6 inches up the barrel.
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Reloadnbob
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