Enough Swiss 1.5G, droptubed, plus a .060" Walters wad to provide about 1/8 inch of compression when you seat the bullet. Fed. 215 LR primer. Bullet will depend on if your rifle is a single shot or lever gun, and the twist rate. The Lee 250 gr. is a good all round design but too light for silhouette. Good lever gun and hunting bullet though.