Chrony Results: .45 BPM

[ClemBert]

I thought I'd following up to the video I made: Test Firing the .45 BPM (http://castboolits.gunloads.com/showthread.php?t=110153) by posting some chrony results.

I took the Walker out last week to do a test drive of my new CED M2 chrony. I fired quite a few rounds through the Walker...both .45 Colt and .45 BPM. The results posted here are very preliminary. I had the Walker sitting back 15 feet from the chrony. When I got up to the 52 grain .45 BPM rounds I started having quite a bit of difficultly with unrecorded/error reports. I had thought it was the position of the sun causing all the problems but I confirmed it was the big loudenboomers. Apparently, the smoke plume was hosing up the chrony. When I dropped back to firing whimpy 40 grain .45 Colt rounds everything was recorded fine. Next time I go out I'm gonna drop back another 5 feet to 20 feet total.

I wouldn't try to draw any conclusions based on these results. They are mostly posted for grins. I need to go back and analyze the results a bit more. Mostly, I just need to get back out there and fire more rounds.

The .45 BPM is fairly respectable. However, I see how it is that the .357 Magnum took the cake in 1934 with that heathen powder. :groner:

http://i40.photobucket.com/albums/e212/SyberTiger/Firearms/Colt%20Walker/45%20BPM%20Test%20Firing/ChonyResults04-06-2011.jpg

[cajun shooter]

I to own a CED 2 and shoot only BP. I can't remember where I read the following information so take it for what it's worth. I was told that if you are too close with the BP blast it will have an effect on the readings. The way around this is to make a blast shield out of a durable material. A piece of plywood or heavy cardboard with a circle big enough cut out for bullet passage in front of the tripods holding the screens.