After reading VolDoc's article in Accurate Shooting years ago, I got interested in trying to kill a PD with a 20BR over a 1,000 yds. I found...it ain't easy...LOL! It's also very expensive! I never made it with a 20BR, but I have made a number of 1000 yd+ shots on PD's with a 6mm/284, 22/243 Imp, and a 20-20/250. The 6/284 turned out to be to difficult to spot your own hits because of muzzle jump. The 20/250 I've killed a number of PD's over 1,000 yds with the 20 cal Berger 55 gr. My longest kill with the 20/250 was last summer in Wyoming at 1,135 yds (3rd-shot) verfied by my shooting friend on a spotting scope. The easiest for me has been the 22-243 IMP. It will handle some wind, and will make 1,200 yds pretty easily. The 20/250 has a couple of problems...it just punches a hole through the PD at a 1,000 yds+, and it doesn't like ANY wind. I do like it though! I've killed a lot of PD's at 700-1200 yds with the 22-243 Imp (longest first shot kill was 948 yds). I can see the hits myself. I like that! I've tried several different scopes and have settled on the NF NXS 8-32 with the MOAR-T reticle. One can hold inside a PD at a 1000 yds.+ with that reticle. Enclosed is a picture of my 22-243 Imp. Panda RBLP, Kreiger 7.7 twist, Jewell trigger, and a Shehane ST-1000 stock. Cartridge on left is the 20/250 with the 55 gr Berger, and rt. is a 22-243 Imp with the 77 gr Sierra BK. I've gone to the 75 gr ELD Match recently. mongo chicago...keep after them PD's at long range. It's a kick for sure!! 7315br