case sizes and amount of powder to push a 30 at 3800

[Catfish]

Evan,
Here are some rules of thumb that make it easier when you start looking at preformance in different cals. and rounds.
1. The larger the bore dia. the faster you can push a bullet of a given weight with a smaller powder charge.
ie. With your favorit .22-250 you can push a 69 gn. bullet to abt 3200 fps. max. With a .250 Savage you can push a 75 gn. bullet to abt. 3400 fps. Same case size but larger bore dia.
2. The smaller the dia. of a bullet of any given wieght the higher the BC. ( assuming they are made of the same matteral.)
ie. The BC of a 125 gn. .357 bullet is abt. .140 where the BC of a105 gn. bullet in .243 is .254.
With these rules we know the the big bore shoot faster and their bullets will drop less at shorter range, but with the smaller BC they will slow down faster. We also know that with the higher BC the smaller dia. bullets will hold their valosity better and at some point be traveling faster than the big bore bullets meaning the will be dropping less at longer ranges. The problem comes when you start trying to find the range at which the advantage changes.
Think abt. that for a while.