I of course (and humbly) agree with JBM above posts.
On the question of which drag curve fits best a certain bullet (IF you have the correct BC data to use other than the G1 function) I've asked about this to a gentleman (HBC) that frequents www.benchrest.com
and has the appropriate equipment to test the bullets:
"I have two Oehler Model 43's with two acoustic targets. I set one target at 101.6 yards and the second at 287.6 yards and the sky screens are spaced 24 feet apart for good resolution. Thus I simultaneously measure BC twice for each round fired.
I have never set the acoustic targets more than 400 yards distance but simulate shooting longer distance by shooting a full charge load and another at about 80%.
The G7 drag table will fit most long range match bullets very well, such as the 6mm Sierra 107 grain MK, The Berger 105 VLD, the more streamlined of the 1000 yard bullets, and the 300 grain .338 MK is another example. Some of the older design MK's with short ogives fit the G1 table better. I have just one test with the Sierra 30 cal. 155 grain MK and it fit the G5 data best, based on that test.
I have experimented with very sharp pointed 6mm boat tail bullets with meplats down to 0.010" diameter and they always fit the G6 data best even though the G6 projectile is a flat base but it has a very sharp meplat. The 100 grain 6mm Lost River bullet fits the G6 table also.
If in doubt when selecting a drag table for a 1000 yard bullet, choose the G7. The G7 also fits some of the short range BC bullets best even though they are flat base (i.e. 68 grain hpfb match) but actually the ogive length of those short range bullets is a higher percentage of the bullet overall length than most 1000 yard bullets.
The results are very good with the G7 data. I think you can expect most long range bullets (VLD), when checked against the G7 data, on holding a BC of well under 2% variation."