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Posted: 3/14/2011 7:14:30 AM EST
Is the trajectory difference that much between 18" to a 20"? I am planning on running an 18" barrel with rifle length gas system which will have a rifle length sight radius. If I zeroed the rifle at 50yd will it be on at 200yd as well? I know that is the case for my 20".
Link Posted: 3/14/2011 9:18:53 AM EST
You are not going to notice the difference between an 18 and a 20 inch barrel at 200 yds. Their difference in muzzle velocity should only amount to an inch or less (most likely closer to 0.5") in POI at 200 yards with a 50 yard zero.
Link Posted: 3/14/2011 10:36:28 AM EST
Any idea in the difference between the standard 25/300 yrd zero? I am trying to figure out if I can go with the 18" and keep my iron setup I have on my 20".
Link Posted: 3/14/2011 10:48:47 AM EST
Originally Posted By 007Kevin:
Any idea in the difference between the standard 25/300 yrd zero? I am trying to figure out if I can go with the 18" and keep my iron setup I have on my 20".


No, you will have to re-zero.
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