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Posted: 7/1/2005 5:36:32 PM EDT
| When I put a riser on my A4 is the point of impact different at 35 and 100 yards when sighted in at the shorter distance........hinking.gifhinking.gif |
| Take a quick look at your weapon, the barrel is lower than the center of the optics tube. If you "site it in" at 35 yards so that the bullet strikes where you held the cross hairs, the bullet had to be on an upward path to get there, it will continue to climb above the "point of aim" (what you where aiming at) untill gravity brings it back down to that same point again (like a rainbow). Bullets aren't like lasers, they are effected by gravity, they will drop at some point. So if you "zeroed" the setup for 35 yards, then shoot at 100 yards, the point of impact will be above the point of aim. Long range shooters must play with this constantly, a guy may site in a weapon at 700 yards, then he learns where to hold the point of aim closer and further away, closer he holds the cross hair low, further he holds it higher. With a scoped setup like yours I'd recomend sighting in at well over 100 yards, as the .223 is a relativelly flat tragectory round, so if you zeroed at say 200 yards, you probably won't need to worry about hold over or hold under till about 400 yards. You can get tragectery charts from remington (for their ammo), they give you an idea what I'm talking about, but you must take into consideration that your scope in most likely mounted higher above the bore than theirs. |
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