I built a 300 blk bolt gun using spare parts. The plan is to keep it subsonic using handloads. What scope do you recommend for this? I've been thinking about the Leupold mark4hd 4-18 with the pr1 reticle. It's the closest reticle to my ZCO mpct1x without the weight of a ZCO. I had a Mark5hd and the parallax was a pain to keep adjusting. So i could go a different brand.