Originally Posted by Joe King
Your talking only about G1 BC figures correct?
Myself I use G7 and to my understanding it is for all intents and purposes a tiger of a different strip, but basically a better fit (base model) to modern long range bullets.
I'm not trying to hijack or confuse anyone so I think it should also be pointed out that.
The standard model projectile for a G1 BC is a flat based spire point
Where the standard model for G7 is a Boattail spire point.
Maybe Bryan Litz can weigh in on this, since he's my source of info on this matter.
Joe, your original question is very good and valid. I'm glad you asked.
Remember that this topic is not about G1 vs. G7, in fact, it has nothing to do
with that. This is all about Air Density and how BCs are referenced to.
Now, the correction is the same no matter what Drag Function. G1, G5, G6, G7 etc.
Just making sure I explain my self, I'll give an example:
The ICAO referenced G7 BC for Berger 300 gr Match Hybrid OTM Tactical is: 0.419--
to use this value in "Exbal" or "Ballistic Explorer", you would modify it to 0.419X1.018=0.427
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