Very much so. Meplat uniformity means everything when it comes to BC spreads. That's the only reason to trim them. I'm not say large variations in OTB should be ignored but that has very little to do with BC uniformity, which as distance increases and becomes one of pillars of ELR. Within reason OAL after trimming meplats is only important in the pointing operations. It has little affect on BC uniformity. In my testing where I trimmed meplats on one side and installed tips on the other side there was a BC spread of 5-6% between the two. That's not talking into account the BC spread in each of the groups. So the individual bullet extremes were greater than that.
Misshaped meplats induce yaw in the bullet.
Interesting because I thought/read
The longer the air is attached to (a thing) wing/ projectile / missile, etc. the more aerodynamic it is
One reason why we would place a stator (connection) between 2 places with an open area in between them - to keep the air attached between the 2 points to not allow a break in the air flow
It is when there is a break in the air attachment (base) is when there is more drag
The sooner the air breaks away the less aerodynamic the projectile
The longer the air can stay attached, the better....
For instance, an airplane wing is more aerodynamic than a round piece of copper wire the same thickness for this one reason alone.
And a longer bullet having higher BC, seems to stand to reason one of the reasons is because....
the air is attached to it longer (because the bullet is longer)
So-----to me uniforming total length would make sense, since the front is just pushing a mach wave more than anything.
While I understand the pointier/sharper the front the object is, the easier it is to slice through the air,
I would have thought that ...if all projectiles have the same laminar attachment, due to same length,....
that would make BC more uniform than frontal surface area.
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So I am open to correction here based on your results
I can tell you've done more testing in this area than I have