What Chronograph to get

[Seismic Sam]

You have a CNC in your home shop, or is this a business you own??!!?? (Holy ****!!) Only thing I would worry about is identifying the frequency range of the IR LED's to make sure the sensor can read them. Not sure how you determine the spectrum width of the sensor other than by trial and error by shining an LED into the sensor and then breaking the beam.

[engnerdan]

You have a CNC in your home shop, or is this a business you own??!!?? (Holy ****!!) Only thing I would worry about is identifying the frequency range of the IR LED's to make sure the sensor can read them. Not sure how you determine the spectrum width of the sensor other than by trial and error by shining an LED into the sensor and then breaking the beam.

There are only a few frequency ranges in commercially available IR LED's. Basically what I have available is "free" so it will be a matter of just giving it a try and seeing if it works.

I do believe Ragged's CNC is at work unless he has moved up the coolness scale without me knowing.

[JJ]

Dead thread bump.

So for the guys using the IR screens I have a couple questions?

I recently tested the same load over the Millenium without IR screens on two seperate days. One sunny (today) and one overcast (last week)

On the overcast day this load gave me an average of 3550. Today the exact same charge gave me 3230 as my average. Components were all from an identical lot with identical prep. The only difference was the sun and temp. I had the higher velocity reading on the day with a lower temp (about 55deg), which is counter-intuitive to data on temp sensitivity. Generally loads shot in low temps need to be dropped in higher temps.

A) Which reading is more likely to be "right"
B)Will the IR screens give me a more true reading?

[RAGGED]

I have no idea why there would be such a difference, but I have only ever used my with the IR screens so I can’t really guess as too which one is closer, might be worth a call to CED to ask the guy who designed it. I will say I can go from a solid 100yd zero straight to 600yd’s using the chrono data, have hit the ½ MOA X ring many many times and have held the 10 ring for elevation almost every time, with multiple rifles, so the numbers from mine with the screens has to be very solid.

[JJ]

I have no idea why there would be such a difference, but I have only ever used my with the IR screens so I can’t really guess as too which one is closer, might be worth a call to CED to ask the guy who designed it. I will say I can go from a solid 100yd zero straight to 600yd’s using the chrono data, have hit the ½ MOA X ring many many times and have held the 10 ring for elevation almost every time, with multiple rifles, so the numbers from mine with the screens has to be very solid.

Yeah, i have never seen a swing that large because of ambient light. Sucks because I have a load that is shootin nicely, but can't trust the data behind it.

[promod1385]

Couple buddies have this one ... http://www.midwayusa.com/viewproduct/?productnumber=852429 ... it's always done ok ... sunscreen legs are easily replaced via Menards/Fleet Farm.

They need SOME sunlight ... overcast is ok ... but not under a roof ... also gotta stand back several feet.

There's more expensive ones, if ya got the cash!

That looks just like the one I shot off the tripod at my uncles place! He has had it for over 20yrs and the diffusers cost me $8 to replace after my "incident".