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Posted: 9/28/2010 6:28:17 AM EDT
| I have an RCBS ammomaster .50 bmg reloading press. I have a barrett M82 with a Bors on it. I shoot Hornady 750 gr Amax rounds throu it. What I am wondering about is should I get a chronograph and adjust powder charge until I get the same speed out of my reloads? Any recomendation for a chronograph Thanks |
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About the only way you can get powder consistency is with a chronograph. I only reload and shoot military surplus, and am in the process of chronying my spotter/tracers to 1750 fps, and my ball, AP, API and APIT to 2850 fps for shooting in my 82. For me, it is kind of necessary because I use a Barrett BORS.
That being said, my present chronograph is a Shooting Chrony, available for around a $100. I'm going to replace it as it seems not to like the concussion and/or pressure wave of the 50. I get a lot of false readings which makes it hard to trust the results. I've ordered an Oehler 35P chronograph. Oehler makes a lot of commercial devices. The 35P is/was one of the Cadillacs of chronographs. They'd stopped selling them for a while but are now in the midst of a special run. I ordered mine in late July with an expected delivery date in late October. You can read the description and specs here: Oehler 35P. It's a tad pricey at around $600 shipped. I'm sure others will have their favorites. |
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I have been using a beta master by shooting chrony for about 12 years now. I used to get false readings until I realised it was the concusion wave doing it. I have the model with the remote readout. Since I have been putting the remote under my bench or on a chair under the bench I have never had a false reading. The other problem I have had was the result of a low charge on the battery, so now I replace the 9 volt battery every Spring and no problems.
Ed |
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I use an F1 Shooting Chrony too.. I like it OK and have made a Plexiglas faceplate (to protect against burning powder kernels) and a wire remote from an old lid switch from a washing machine. It works great now that I’ve learned that it needs to be set up far enough from the muzzle to prevent blast from giving false readings. Also it helps to keep the muzzle blast from knocking it over or blowing off the sky screens. Taping the screens to the support legs helps too.
I’d read a lot of good things about the shooting chrony and for the price, it’s an excellent deal. I didn’t want to spend over $100 for something that I’ll probably accidentally end up shooting at some point. I've blown it over and it's had serveral hard landings and so far it still works fine. |
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Interesting info there Led, will have to give that a try some time.
I have the Pact chroney. It to was having weird readings. Talked to one of their techs and he also told me to put it under the bench on a stool. It was the concussions on the box with the read out. This chrono uses 1/4 stereo plugs and jacks to connect the sensors (remote) to the display. Seems the the boom is enough to cause loose connections. All I know is that this seems to have also cured my problem like several others have noted. |
| I have the Shooting Chrony with the printer and set it at the distance from the muzzle that the cord for the printer allows me to. Works fine doing it that way. I used to have a Beta Chrony but one evening when the light was failing I thought if I shot a little closer to the sky screen I'd get better reading. Whoops, they don't like bullets going through the front of the machine. At first I though the muzzle blast would screw everything up but keeping it at 10 yards seems to work just fine. I've got an old Olher 33 that I've not used in the last 20 years. I like the Shooting Chrony much better. |
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