huh? Pretty much all firearms will shoot non lead projectiles. How high or low the bullet hits has nothing to do with whether a gun likes a bullet or not. The rounds might be loaded hotter, causing it to hit high, or the bullet might cut the wind better, higher BC causing it to hit higher, Neither have to do with whether or not the gun likes it. The real question for me would be whether or not the rounds group well. I will typically shoot a couple fouling shots before testing a new ammo. For the new ammo I shoot a full 20rnd box, 4 groups of 5rnds each and average the groups to get the accuracy for that ammo out of that gun.