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Joined: Jul 2001
Posts: 59,898
Campfire Kahuna
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Campfire Kahuna
Joined: Jul 2001
Posts: 59,898 |
Homesteader,
Hey, downrange ballistics are always something of a semi-mystery, and I suspect it doesn't matter much with head-shots!
No doubt the Hornady ballistic tables use "standard atmospheric conditions," 59 degrees F. at sea level. I figured the 50+ foot-pounds in my post with a ballistic program at 75 degrees at 4000 feet above sea level--about the conditions we were shooting in when my partner made the 303-yard shot.
Also, Hornady .17 HMR ammo is loaded with Li'l Gun powder (or at least was, when I visited the factory where it's made a while back). Li'l Gun is good stuff but not particularly temperature-resistant. I've chronographed 17-grain ammo on 85-90 degree days, not unusual when shooting small rodents here in Montana, and gotten over 2700 fps. At 110 degrees it might come close to 3000!
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
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Joined: Nov 2008
Posts: 1,438
Campfire Regular
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Campfire Regular
Joined: Nov 2008
Posts: 1,438 |
John - my post is good reason to ask Santa for a chronograph this year. SWAG's, in this day & age, just don't cut it anymore. BTW - is "foot/ounces" a legitimate measurement term - LOL? Homesteader
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Joined: Jul 2001
Posts: 59,898
Campfire Kahuna
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Campfire Kahuna
Joined: Jul 2001
Posts: 59,898 |
I would certainly apply foot-ounces to the ballistics of "mouse guns"....
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
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Joined: Apr 2006
Posts: 4,389
Campfire Tracker
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Campfire Tracker
Joined: Apr 2006
Posts: 4,389 |
I recently put Weaver 3-9x32 AO RV-9's on my 17 HMR and a couple of 22 LR's. Seems like a decent scope for the money, though doesn't meet your friend's magnification requirements...
Last edited by JGray; 08/18/15.
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Joined: Nov 2008
Posts: 1,438
Campfire Regular
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Campfire Regular
Joined: Nov 2008
Posts: 1,438 |
JGray - +1 IMO, those are sensible scopes for the intended purpose. Take a CZ452FS as a example - would you want to mount a scope w/ high power & 56mm objective on such a svelte piece?
That would be akin to the Hubble telescope and better suited to counting the rings of Saturn. Sure, you could do it but it would look a bit odd. Mine has a older Weaver 2-7X remounted from a M600 in .308W. It just looks 'right'. Homesteader
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Joined: Dec 2002
Posts: 32,029
Campfire 'Bwana
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Campfire 'Bwana
Joined: Dec 2002
Posts: 32,029 |
I believe that because of the location of the rear sight on a 452FS, you've got to use medium or higher rings in order to allow any objective larger than 28mm to clear the top of the rear sight. I have Weaver RV7s, 2.5-7x28, on my 452FS' because they fit better than any others that I have tried.
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Joined: Apr 2006
Posts: 4,389
Campfire Tracker
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Campfire Tracker
Joined: Apr 2006
Posts: 4,389 |
JGray - +1 IMO, those are sensible scopes for the intended purpose. Take a CZ452FS as a example - would you want to mount a scope w/ high power & 56mm objective on such a svelte piece?
That would be akin to the Hubble telescope and better suited to counting the rings of Saturn. Sure, you could do it but it would look a bit odd. Mine has a older Weaver 2-7X remounted from a M600 in .308W. It just looks 'right'. Homesteader I had a couple of Mueller 4.5-14's on rimfires until recently - just to damn big. I do like the smaller size of the Weaver, but in all honesty, my favorite scope for varminting (rimfires and centerfires) is a Leupold 4-12 AO.
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