Ok a gentleman, so I have a Remington 700 SPS Varmint in 223. This used to be my go to coyote gun, but I built an AR 15 for coyote and want to make this a target gun for longer ranges 400+ yards. I was using 36gr. Barnes varmint grenade. They look good on paper out to 300 yards, but past that they are unreliable and inconsistent. If you gentlemen have any experience with this gun I would appreciate any tips for a good target round.