Anybody shooting 230gr. A-tips?

I ran the 230 Berger hybrid at 3.78 col but I don't remember the charge weight on my 300Rum 1/10 twist. Up to about 1200 yards I was good. Then tried a mile and it was whole different ball game. I think most of the issue was me. But I was only hitting about a 4 by 4 foot circle. Did have some wind that day but my inexperience at that extended range is definitely a limiting factor. First time I ever tried shooting that far also. My load at the time was also about a 3/4 or .8 MOA load but it worked for the 1000yrd hunting.
 
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