I am a new member and was wanting to pick the brains of some of you veterans. I recently bought a RRA Varmint with a 20" barrel with a 1 in 8 twist. I am currently using blackhills 68gr BTHP and I am recieving .5 to .75 moa groups at 100 yards and occasionally out to 200 Yards (needing to work on fundamentals a little more) but was wondering if anyone had any experience with this bullet gun combo out to 300 and 400 yards. Or do I need to go to the a 75 grain. My ultimate goal is to have is set a 200 and to be able to make a 500 yard shot though with my talents 300 to 400 is more realistic but would like to have the option if I can get my skills improved over time.