I have an H&R Ultra hunter and have reloaded brass and full length resized about 5-6 times and then this happened.Next reload on my 25-06 , starting at min recommeneded start load with new powder and working up to max load. I did not get to recommeneded max load and this happened. Crack appeared on the 1st rnd but I did not noticed until one case extracted and then came apart after hitting the ground. Noticed after about 4 rnds the cases had a crack around the case head. The 5th had almost completely cracked but extracted from chamber. The 6th rnd completely seperated and case got stuck. Did a terrible job of removing case ? Over worked brass? Left a couple of scratches from removing brass,would that scew up the chamber demensions? Have not shot the rifle since then. Just wondering because reloading manual says to full length size cases everytime for break open actions or cases will not extract and that is true. Tried that on my .223 H&R and cases do not extract if not full length resized. Safe to shoot gun or get new barrel for gun?Any insight woulld be helpful?