im sure that there is some jet brass out there ? i had 2 jets years ago ,a contender and a s & w never shot the s&w as it was unfired and full target with a extra aux 22 lr cylinder. try using the bullet seat die with the decapping rod/expander removed from the die, this die is a little larger then the sizing die ,i had to do this years ago when they quit making 350 rem mag brass, you may also try to find a file trim die which also may work, just watch the overall length of the of the case while forming and a good sizer lube