[Jack Monteith]

I've got an old F-1 Chrony, works. It's not an Oehler, but it's price competive. I won't mind having a Master with the remote readout. Usually I set up 10 ft. from the muzzle and I can read it from there, but some fireball powders and black powder will trigger the sensors at 10 ft if it's getting dark. So sometimes I set up at 20 ft., eyestain distance. One time the Chrony quit when I was shooting the flinter. Found a patch sitting on the rear sensor.

Whether you buy a Chrony or an Oehler, first thing you do is round up 3-5 .22 rifles & a box of Long Rifle and put 10 rounds from each over your unit. Very educational. When you set up, run a few .22s over your unit before you start popping Noslers. Sometimes you have a bad battery or a bad setup. If possible, set up so the sun's at a right angle to your line of fire so your sensors aren't getting direct sunlight on them.

I had one problem that drove me up the wall last year. The Chrony worked with subsonic and full snort .30-06 loads, but gave me goofy readings in the 1200-1400 fps range. The female side of the 9V battery connector was loose, and I think the shock wave from the bullet was jiggling it enough to make the Chrony lose count. The `06 bullets were over the second sensor before the shock wave hit the battery.

Bye
Jack

 

[Jack Monteith]

Hi, 1bad:
Number One! No chronograph works under fluorescent lights.

My old Chrony needs a fair amount of light. The new ones might be better, don't know. If you're using artifical light, be sure the sensors are evenly lit. I tried hanging a couple of trouble lights over the Chrony and the standard deviation went way up. If you plan on shooting indoors, get the indoor light fixture.
http://chrony.ca/

Here's a review of the Master Gamma Chrony.
http://www.realguns.com/Commentary/comar44.htm

Wish I could find powder at that price.

Bye
Jack