RE: .243 Long Range Bullet
If the 105 Berger is one of their VLD bullets, it probably won't stabilize out of most commercial .243 Winchester sporting rifles- although it would most likely fly just fine from a faster 6mm like the .240 Weatherby.
Some other candidates would include the 85 grain Hornady Interbondwith a ballistic coefficient of .395, the 90 grain Swift Sciroccowith a b.c. of .419,and the regular unbonded 85 grain boat-tail spitzer from Speer that's got a b.c. of .404. Speer and Sierra also have 100 grainboat-tails with b.c.'s of .430 or better.
Velocity over the entire flight of the bullet determines wind drift and drop. The lighter 85 and 90 grain bullets should start out a little faster, but the heavier bullets with higher b.c.'s should maintain their speed a little better. Which is better depends on how far you really plan to shoot, and at exactly what range the heavier bullets catch up to the lighter ones.
And yeah, the 95 grain Ballistic Tips and SST's should work just fine as long as you're up to making a good shot. Theirb.c.'s are around .380, which is more than adequate for adecent trajectory to 300yards.