What hardness should I go for if I want no expansion at 1250 fps? Straight line penetration is the goal. I do powdercoat, not sure if that makes a difference. I only have COWW and pewter on hand, can I get by with that or will I need to go harder? BTW I do not have a hardness tester, just use the alloy calculator on here to get me close. I had used some 3-3-94 alloy this past year for deer hunting and it worked very well, but I am afraid that even at 1250 fps it would expand a bit? Thanks