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3/14/2004 6:48:15 AM EDT
what would the difference be between
XM193 55gr and M855 62gr at say
100 200 300 meters and on
Ive been told its almost no difference but I dont think so especially at longer distances
any ballistic charts out there
thanks
I need to sight in soon
3/14/2004 8:32:37 AM EDT
[#1]
Although it's intended for ACOGs, [blue]Bartholomew_Roberts[/blue] has an exquisitely detailed BDC chart [url=http://www.ar15.com/forums/topic.html?b=3&f=18&t=152794]HERE[/url] that should help you [:)]
3/14/2004 8:50:15 AM EDT
[#2]
Close range there is almost no difference, at longer ranges there is a difference.

IIRC there is also a drift difference - its covered in one of the appendixes of FM23-9 (you can find a downloadable copy at a variety of websites for free)
3/14/2004 12:41:47 PM EDT
[#3]
actually it is for an acog but i never found this in the search...
Im sighting in my ACOG NSN and its dead nuts
my 25 meter initial sight in put 3 bullets in less than 1/2 an inch...I put them into a hole that was in the top of the carboard silhouette...i guess a hanging hole for ita
and then 10 rounds inside a 3 inch shoot and see so it is less than a 3 inch group at 100 meters prob about 2 1/4
im not a sharpshooter by any means

I did sight in as per trijicons manual
Federal XM193 55gr ammo was used
using the 300 meter mark to get it in the ballpark 16 inch barrel 1:9 twist flattop mount
it put 10 bullets in a 1 inch diamond
and at 100 meters put 3 within 2 1/4 inches and one flyer when the wind blew and shoot the table I was on

I love this sight next time I have to look a little harder for that topic
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