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Join Date: Aug 2003
Location: Harrisburg, PA Hunt 2F
Took the .45 and .50 cal Bedfords out to do some shooting and experimenting. Chrono'd the .45 to satisfy my curiosity. It averaged 1900 fps with a .440 ball, .020 patch and 70 gr of 3f. (with that velocity, I'd probably even be comfortable backing off the charge a bit, depending on how it groups). Shot an inch to the left, where I left it last year, but will fix that next trip.
Decided to shoot the .50 cal at 100 yds to see what it would do and where it hit, like I do with my other .50 and .54 rifles.
Now the perplexing part. Past experience showed me that both my .54 and other .50 both shot groups between 3-4 inches and 6-8 inches low. Fired the 1st shot with this new .50 and it went 5-6 inches high at 10-11 o'clock near top edge of paper. Hmmm? So, fired a 2nd shot and it hit 3-4 inches high near edge of paper at 2:30. Quit then to think that out a bit and save powder, plus the range started to fill up (that time of year). Load was not the hunting load I had decided on, but did group very tight when I chono'd the load. 80 gr 3f .490 ball .020 patch. Averaged 1966 fps and was curious
Only "WAG" I have right now is my "baseball" theory. My other rifles have 1-66 twist. This one has a 1-56 twist. Thinking the faster rate of twist with the higher velocity is over spinning the ball and it is flying off a bit. Kind of how spin on a baseball will effect it's flight. Like I said, just a WAG
Next trip to the range I will back off to the planned hunting load (70 gr 3f which shoots well at 50 yds) and see what it does. I'm not tore up that it did not group at 100 yds, but like with my other rifles, like to know it can "just in case".
Any ideas or similar experience from others? will let you know what happens when I back off the charge. Just never had a load go high at 100 yds. Like I said, expected 6-8 inches low, even if grouping sucked
USAF Security Police, MSgt (Retired)
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