I just picked at a yard sale a box of bullets in 30. cal. They are made by Berger. It says they are for a 1 in 11 twist rate or faster. I am reloading for a 1917 Eddystone 30.06, which I believe is a 1 in 10 twist rate. My question is WHY do they say for a 1 in 11 twist rate or faster? All the other bullets I have ever seen on the store shelves, Hornady, Speer, Nosler, etc, don't have this warning. What makes these bullets special to have that printed on the box? Will they tumble, or break apart in flight, will they not handle the pressure???? What do you guys think? Since I don't use the rifle for hunting, and just 'blowing' up rocks at long distances, can I use them? Or should I get my 5 bucks back?