I recently picked up a trg-s sako brand new in the box. It's in 7mm stw and I could not find nosler brass for it. I settled on 8mm Remington magnum nosler brass and I am going to run it through the die but then I need to blow the case back out. I ask this because I got some old remington 8mm stuff with the gun. I ran it through the die and then filled the case approx 1/3 with pistol powder then topped off with cream of wheat and stuffed a tissue in the neck. I shot it to blow out the case like a ppc. Needless to say the bolt was plenty sticky and it blew out the primer pocket. (it was quite loud too.) I didn't want to shoot all the cases with a regular load because of a stw barrel life. I also don't want to screw up almost 3$ a piece case of nosler brass. I've done the case forming in a lot of smaller calibers but nothing this big. Thanks for any help.