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May 10, 2015, 09:51 PM | #26 | |
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Join Date: December 20, 2008
Location: Somewhere on the Southern shore of Lake Travis, TX
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Quote:
I plugged the BC for a .319 rb (.045) into my bookmarked online ballistic calculator and entered a muzzle velocity of 1000 fps and it indicated 10 inches of drop if zeroed at fifty yards. Also, 3.7 inches of drift in a five mph cross wind. Residual velocity at 100 yards will be around 780 fps. There's a much higher velocity retention with distance once you are subsonic which is why roundballs shot from pistols have a surprisingly low wind drift compared to rifles.
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May 11, 2015, 12:03 AM | #27 |
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Join Date: June 17, 2010
Location: Virginia
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0.319 ball / 1,000fps muzzle / with a sight 3/4" above centerline / center hold:
25yd zero = 18" low at 100 50yd zero = 14" low at 100 75yd zero = 08" low at 100 |
May 11, 2015, 06:13 AM | #28 |
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Join Date: July 26, 2006
Location: Southern Minnesota
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PAHOO... that looks to be the sight that I currently have on the rear ( well... that I've pulled off now )... the detent ball has been lost so I line it up & tighten good... I don't like that the aperture tightness holds the windage adjustment... so adjusting is not precise... also if I wanted to change sizes, I lose my adjustment...
I only have a blade front sight... the set up worked good enough for me to get 2nd place... I may have to get the detent ball fixed, & save the sight... but thinking more along the lines of the Lyman rear sight & something similar to the same front as you are using, in the correct height for the shorter Lyman sight...
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May 11, 2015, 10:17 AM | #29 | |
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Join Date: February 16, 2006
Location: IOWA
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Match the front globe, to the rear sight ...
Magnum,
This original set-up was offered by TC, a few years back. I know for a fact, that the front globe is made by Lyman and it's still available, along with the inserts. You can also buy the set of inserts. I doubt that TC ever made and original sight and just contracted them in. Given that, I do not know who actually made the vernier short range tang sight. Depending on the rear sight, you need to size the front globe accordingly. Lyman can assist you on this selection as they have a chart. ..... Quote:
Thanks again and; Be Safe !!!
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