Re: Bdc or bullet drop compensator turrets ?
Get both, the reticules will be dead on at some yardage for your gun, easy to figure out. Once you know what the best one is, get a custom torrent that starts at that zero yardage. Say 4 or 5 hundred yards. I've got 4 Leupold varmint reticules, that are dead on, plus or minus 10 yards to 500 yards. Then you buy a custom torrent that starts at your 4 or 500 yard zero. So beyond 500 You dial your custom dial and shoot the 500 yard reticule. Gives you much shorter dials and allows you to dial out to 1000 yards. My 270 starts with a 400 yard zero and I can dial to 1000 yards. If I started at 200, where my main reticule is, I could only dial to 800 yards because you can only dial as far as they can put marks. On that note, go with the tallest torrents and the largest adjustments. My target torrents allow me to dial 3 full turns, but my .10 MOA clicks reduces how much travel I get in each of those turns. Ideally, tall torrents and .3 moa clicks. That is one think Huskemaw got right.
So, I don't dial until I reach the max yardage I have a good reticule for, but I can dial much further, using that last good reticule.
Hope I made that understandable. It works like a champ! I shoot 900 yards with my 270, 308 and 6.5X47Lapua (both of them)...