12 inches low at 20 yards is how low at 100?
11-25-2005, 08:53 AM
#1
Giant Nontypical
Thread Starter
Join Date: Feb 2003
Location: Gambrills Md US
Posts: 6,080
12 inches low at 20 yards is how low at 100?
I still have to order my pos align inserts, but they come in different sizes based on how much you need to adjust, and specify being off so many inches at 100 yards. I am 12 inches low at 20 yards, so how many inches low would that equate to at 100 yards? It is a Mossberg 500 with rifled barrel.
Thanks!
Thanks!
11-25-2005, 09:02 AM
#2
Giant Nontypical
Join Date: Feb 2003
Location: fort mcmurray alberta canada
Posts: 5,667
RE: 12 inches low at 20 yards is how low at 100?
How high is the center of your scope above the center of the bore and how far apart are the rings?Knowing these measurements will allow a calculation to put you in the ballpark.Using basic geometry 12" at 20 yards converts to 60" at 100 yards but that does not take into account the height of the crosshairs above the bore or the distance between the rings.
11-26-2005, 10:39 AM
#6
Giant Nontypical
Join Date: Feb 2003
Location: Port Neches, Texas
Posts: 5,514
RE: 12 inches low at 20 yards is how low at 100?
At 60" that would be putting the bullet in the ground at 100 yards! With 1/4" intervals, that'd be 240 clicks up! You said you are getting posi-line inserts. Are you sure something else isn't wrong?
11-26-2005, 03:38 PM
#8
Giant Nontypical
Join Date: Feb 2003
Location: fort mcmurray alberta canada
Posts: 5,667
RE: 12 inches low at 20 yards is how low at 100?
The crosshairs being 2-1/4" above the bore is certainly a contributing factor.I have seen more than one gun with see through mounts that could not be sighted in without shims.
