Thread: Faster than a bat out of Hell

So.. have pondered this before. If you took a Remington 7 mm mag and extended the fat belt right up to shoulder and left everything else the same,my pondering is that you will have created a very strong case who's body won't stretch.... For sure eventually the shoulder n neck or primer pocket will give out... But a thick walked brass case would be reloadable and could maybe handle higher pressures...this looks to have done same thing by using steel not brass case.... How hot can the steel cases used in Barnaul etc loads be safely used now??? They already in three popular cartridge sizes.