Better at 200 yards

[drt]

I shot at the range yesterday from the prone position. This is the first time at the range doing so.
My groups at 100 yds were a little disappointing, but since the wind was a steady speed, but changing from left to right to almost head on.
http://i1206.photobucket.com/albums/bb450/snteevveetns/0510111005a.jpg

My 200 yrd groups were 3 inches low, but all about 1 inch. So that's sub MOA-and OK in any book.
http://i1206.photobucket.com/albums/bb450/snteevveetns/0510111005.jpg

(Home made targets, 1 inch squares)
The whole purpose of this trip to the range was to determine how much bullet drop there was in the two different bullet weights I am shooting (Ultramax .223 55GR FMJ and Black Hills .223 77GR Sierra Matchking HP). I was very surprised to see the 77gr only drop 3 inches and the 55gr drop about 5 inches. Ultramax lists the velocity at 3000fps and Black Hills @2750fps.

[WYcoyote]

Is this an example of a bullet "going to sleep"?

[keeki]

the two different bullets cant really be compared like this because theyre gonna have different POI's, unless of course you rezero your rifle with each different bullet at the same given distance. Without rezeroing your rifle the heavier bullet will always have a higher point of impact than the lighter less recoiling bullet.

[CJ in WY]

Did you adjust the parrelax on the scope?
The 55 should drop 3.3"@ 200 yards and the 77 somewhere around 3.6" @ 200.
The best way to check all this out without a crony and useing your setup is to shoot the same target @ 1-2-300 yards aiming at the same point and see where the bullets land.

[helotaxi]

the heavier bullet will always have a higher point of impact than the lighter less recoiling bullet.

Only really true when shooting unsupported. From a rest, muzzle climb should not be a factor.