I have a .243 that was handed down from my dad. I have done several loads with troubling results. I have loaded Hornaday 100 gr as well Noslar Partiton 100 gr. with 40 grains of H4831 powder. When I fire these rounds the primer disintegrates and occaisonaly will jam up the rifle until it cools down. I have been told that the load is to hot. I reduced the powder and get the same result. I bought some factory rounds, Federal Premium 100 grain Nosler Partition. The primer pocket stays in tack, but the primer will intend outward instead inward. Almost like it is being sucked out of the primer pocket. Is this a function of an old rifle that needs work or is my reloading recipe not quite right?