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Feb 12th, 2024
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 Re: Any Negatives to 20 MOA Bases?
[Re: Gone to Texas]
#5635977
03/05/15 06:01 PM
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Joined: Aug 2009
Posts: 22,716
BigPig
THF Celebrity
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THF Celebrity
Joined: Aug 2009
Posts: 22,716 |
This is the drop of a 308Win from a rifle with a scope height of 1.5 inches and sighted in a 100yds, the only time the bullet has the same point of impact is at the muzzle (0 yards) and 150 yards.
Range(yd) Drop(in) Wind Drift(in) Velocity(fps) Energy(ft-lb)
0 -1.5 0.0 2650 2619
50 -0.1 0.2 2554 2433
100 0.0 0.7 2460 2257
150 -1.3 1.6 2367 2091
200 -4.3 3.1 2277 1935
250 -8.9 5.0 2189 1788
300 -15.3 7.4 2103 1650
350 -23.6 10.2 2018 1520
400 -34.0 13.4 1936 1398
450 -46.7 17.4 1855 1284
500 -62.1 22.0 1778 1179
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Re: Any Negatives to 20 MOA Bases?
[Re: BigPig]
#5636204
03/05/15 07:47 PM
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Joined: Nov 2004
Posts: 14,768
jeh7mmmag
gramps
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gramps
Joined: Nov 2004
Posts: 14,768 |
This is the drop of a 308Win from a rifle with a scope height of 1.5 inches and sighted in a 100yds, the only time the bullet has the same point of impact is at the muzzle (0 yards) and 150 yards.
Range(yd) Drop(in) Wind Drift(in) Velocity(fps) Energy(ft-lb)
0 -1.5 0.0 2650 2619
50 -0.1 0.2 2554 2433
100 0.0 0.7 2460 2257
150 -1.3 1.6 2367 2091
200 -4.3 3.1 2277 1935
250 -8.9 5.0 2189 1788
300 -15.3 7.4 2103 1650
350 -23.6 10.2 2018 1520
400 -34.0 13.4 1936 1398
450 -46.7 17.4 1855 1284
500 -62.1 22.0 1778 1179
Good figures above. Thanks for the numbers.  My thinking was based on using MPBR and sighting in at 100 yds about 2.0 inch high. Using MPBR your Maximum mid range height would be around 160 and second zero would also be around 200yds + on a typical hunting caliber. I am not used to sighting in zero at 100 yds and finally woke up. I was in error and did not think about the 100 yd zero and 1.5 height scope. The maximum midrange height would be at 100 yds as FJG stated above. With a very flat shooter and a very high scope mount you could see a maximum mid range hieght occur past the 100 yds. ?? What is the typical scope heights on AR?
�Everybody needs beauty as well as bread, places to play in and pray in,
where nature may heal and give strength to body and soul.�
~ John Muir
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Re: Any Negatives to 20 MOA Bases?
[Re: BigPig]
#5636254
03/05/15 08:10 PM
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Joined: Nov 2011
Posts: 4,562
patriot07
Extreme Tracker
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Extreme Tracker
Joined: Nov 2011
Posts: 4,562 |
This is the drop of a 308Win from a rifle with a scope height of 1.5 inches and sighted in a 100yds, the only time the bullet has the same point of impact is at the muzzle (0 yards) and 150 yards.
Range(yd) Drop(in) Wind Drift(in) Velocity(fps) Energy(ft-lb)
0 -1.5 0.0 2650 2619
50 -0.1 0.2 2554 2433
100 0.0 0.7 2460 2257
150 -1.3 1.6 2367 2091
200 -4.3 3.1 2277 1935
250 -8.9 5.0 2189 1788
300 -15.3 7.4 2103 1650
350 -23.6 10.2 2018 1520
400 -34.0 13.4 1936 1398
450 -46.7 17.4 1855 1284
500 -62.1 22.0 1778 1179
Looks to me like it would be at around 60 yards and 100 yards, right? (the bullet being above point of aim in between) The muzzle and 150 yards aren't the same.
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Re: Any Negatives to 20 MOA Bases?
[Re: Gone to Texas]
#5637954
03/06/15 06:49 PM
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Joined: Mar 2015
Posts: 27
Lead Kisses
Light Foot
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Light Foot
Joined: Mar 2015
Posts: 27 |
I just e-mailed Vortex about this last weekend. 20 MOAs for 800+ yards. I would see if you can squeeze low rings on there. I'm pretty sure that I've mounted them with Warne lows.
I think what usdrscott is trying to say about the Viper PST line is that its an introductory scope to precision shooting. You're getting a scope packed full of features (FFP, turrets, illumination, ect) but the Achilles heal of the optic is the glass clarity. It isn't bad, but that's where it suffers. It's like buying a set of golf clubs at Academy. You've got a full set of irons and a couple hybrids but if you're really playing at a high level, it may be worth your time to go to a shop and get fitted.
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Re: Any Negatives to 20 MOA Bases?
[Re: Gone to Texas]
#5642612
03/09/15 02:54 PM
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Joined: Feb 2009
Posts: 1,308
Precision_Shooter
Pro Tracker
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Pro Tracker
Joined: Feb 2009
Posts: 1,308 |
Warne Lows worked perfectly on my rifle with 20moa base...
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Re: Any Negatives to 20 MOA Bases?
[Re: jeh7mmmag]
#5642750
03/09/15 04:21 PM
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Joined: Sep 2006
Posts: 32,482
kmon11
junior
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junior
Joined: Sep 2006
Posts: 32,482 |
?? What is the typical scope heights on AR?
Depends on the mounts but usually 2.4 to 2.6 inches above bore.
lf the saying "Liar, Liar your pants on fire" were true
Mainstream news might be fun to watch
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Re: Any Negatives to 20 MOA Bases?
[Re: Lead Kisses]
#5642947
03/09/15 06:15 PM
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Joined: Nov 2010
Posts: 27,091
Nogalus Prairie
THF Celebrity
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THF Celebrity
Joined: Nov 2010
Posts: 27,091 |
I just e-mailed Vortex about this last weekend. 20 MOAs for 800+ yards. I would see if you can squeeze low rings on there. I'm pretty sure that I've mounted them with Warne lows.
I think what usdrscott is trying to say about the Viper PST line is that its an introductory scope to precision shooting. You're getting a scope packed full of features (FFP, turrets, illumination, ect) but the Achilles heal of the optic is the glass clarity. It isn't bad, but that's where it suffers. It's like buying a set of golf clubs at Academy. You've got a full set of irons and a couple hybrids but if you're really playing at a high level, it may be worth your time to go to a shop and get fitted. I am no LR expert (I think, often as not, that is a help in reading some of these threads), but IMO that was exactly what he was saying.
I learned long ago you can't reason someone out of something they don't reason themselves into.
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