it it my understanding that the alloy formulas typically used over the years to produce rifle, handgun and shotgun frames or receivers, are quite different. hence, it would make since that the factory heat treating processes used for these various types of firearm frames and receivers would also be different? or to express it another way, what works for rifle receivers, is not the same as what works for handgun frames? and then there is the whole subject of shotgun receivers? anybody have any thoughts to share here? maybe we can start a new thread, as this one is gittin kinda old and stale....

keep it simple and keep it safe...