Re: trimming the bullet meplay for better BC
Have you guys experimented with cutting the tips way back, or just enough so they all clean up square vs. the wild uneven ones etc.
Have you played with boring the HP out larger and it's effects either?
Do the really wildly uneven tip always reduce BC by a certain amount?
Have you all established a baseline BC ES for the squared tiped bullets and compared them to the ES of random selected out of the box bullets?
Sorry for the twenty questions. [img]images/icons/smile.gif[/img] I never thought of testing this, but the SMK's especially are definitely pretty whacked in this area.
I'm curious, do you guys leave the acoustic target set up, or use a stand for it that is always a set distance from the bench?
I don't have this type of permanent setup, it's a real PITA to get accurate measurements without this.
As I'm sure you're aware of, the distance is very critical for absolute BC numbers, relative ones for tests like you're doing would be easier, if that's all you were after.
I usually measure from the frame it's taped up back to the front of the bench, then subtract from this the distance the muzzle of each rifle stick out beyond the bench.
Do you guys use a seperate frame for the acoustic target just ahead of another target frame to icsolate the sound traveling through the frame. It does travel faster through the wood than it does through the air, and often the target backer material will transfer this noise to the sensor before the mach wave reaches it.
The sensor will sometimes trigger too soon in this case.
A side note on the acoustic target:
I learned something you might find handy if you ever think you might be having a problem with a sensor not functioning. If you have access to a 35P you can plug the acoustic leads into, tapping the white plastic of the sensor with a fingernail should trigger the printer to print. If it doesn't it isn't working. You have to plug each sensor into the "on" plug in on the 35P (left plug on the 35P) and test one at a time tho. It will just print zeros, but the sensitivity of the sensor can be verified this way.
[ 11-25-2003: Message edited by: Brent ]