opinions on a remmy 700 VTR 223 as a 500+ gun

[Catfish]

I have 2 coyote gun that I use most of the time. My AR in .223 which I refer to as my up close and personal gun. It shoots point blank to abt 260 yrds. and by holding over I can do reasonably good to 300 or so. My other is a .22-6mm. I call it my reach out and touch them gun. I have a drop chart out to 1,000 yrds. on the stock and with no wind should do reasonably well out there. 500 to 600 yrds. in a 10 mph. wind is do able. I`m pushing an 80 gn. .22 cal. Bullet at 3,350 fps. I can get a couple hunderd fps. more but accuracy drops of.
If I were going to try a .223 for 500 + I would go with an 8 twist and run 75 or 80 gn. bullets. You will need a good drop chart because if you zero at 400 yrds. you be around 21 in. low at 500 yrds.
If you really want to get serious about 500 + you need a high bc bullet and the faster you push it the better. I`ve got a friend that uses a 7mm mag. and a .300 Win. short mag. for out there for coyotes.