Would you agree with the idea that the larger the caliber the easier it is to build a high bc bullet? I grew up thinking 7mm bullets were higher bc than anything else without thinking why. Now we are starting to see some higher bc bullets in 338 and 375. A good example of caliber relationship to bc is provided by Hornady's Amax line: 224 80g bc=0.453 243 105g bc=0.500 264 140g bc=0.550 284 162g bc=0.625 308 208g bc=0.648 510 750g bc=1.050 You'll never see a bc=1.05 bullet in 224 caliber save maybe a two pointed pencil solid, or will you? I'm thinking now the small calibers are limited mainly by the fast twist needed to launch long bullets and the larger calibers, say 375, are limited mainly by heavy bullet weight. It's hard to launch a 400 g bullet really fast. What do you think?