Took the Savage 24 in .223/20ga to the range today. Had worked up a load using RL-19, that really worked good in my H&R Ultra. First two rounds went well, third round and gun flew open. Fourth round gun opened again. Fifth round and everything worked properly. Bullets were all over the place. This round is not for the Savage. I marked the box for the "Ultra Only". Was really surprised, had never had that happen before.