All I can add is that during load developement I found the poly tipped bullets did much better than the hollow points for the range of 50-55gr bullets. This held true at 100 and 200 yds. I never did find a working combo for the Sierra GK's, 55gr so they have been relagated to plinking rounds and fire forming brass. Of all the tested bullets, the Nosler Varmageddon FB Tipped (black poly) really shone.
Current load data for that is (I assume no liability, responsibility, for use of this data. Always work up to a load):
Nosler 55gr Varmageddon FB Tipped P/N 17240
FC Match brass, Rem 7 1/2 primer
H335 powder @ 25.0gr
OAL = 2.260"
One of the Federal American Eagle factory 223 cartridges uses this bullet and they shoot, in my rifle, pretty close to my handloads.
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