i have been doing some studying on the berger VLD bullets and im thinking of using them on my 300 weaterby mag. the problem is, is that im am kind of confused. i have been reading some articles that say you have to have to change the twist rate on your rifle for them to shoot accuratly. is that true? cause i don't want to buy them if they are not going to be very accurate out of my stock weatherby because if the normal twist rate. also, you can get the bullets in a 168 grain and a 185 grain bullet. does anybody know wich one would be a better bullet to shoot? would one be more accurate than the other? Thanks.