Re: Why 30 cal?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Hawk45</div><div class="ubbcode-body">Other than the 7mm offerings having slightly better ballistics, tell me what a 7mm can do that a .30cal can't? Recoil seems to be the biggest detractor followed by ballistics (probably vice versa). Keep in mind that some 7mm bullets have a harder time staying stabilized when going transonic for you longer range shooters based on elevation. Mountain guys should be good to go.. sea-level guys might get tumbling. </div></div>
BC is very much related to the weight/length of a bullet. Any bullet with the same form factor will have same/similar BC. The difference is that it's TOTALLY REASONABLE to launch a 162gr bullet at 3000fps, and a big deal to launch a 220gr bullet at 3000fps. So, when comparing a 7mm loading with reasonable recoil to a 30cal with reasonable recoil, the ballistics of the 7mm are not "slightly better" than 30 cal. They are hand's-down, bitch-slap you across the face better.
Also, in repsonse to your statement about 7mm bullets behaving poorly in the transonic regime: This is not a product of, or specifically a 7mm thing, or even a small bullet thing. It's all about bullet design. I've seen bullets of ALL calibers perform both great, and like crap when going transonic. It's all about the design of the bullet, not its caliber, or its weight.