Re: M3 Replacement BDC turret in .308
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: dmg308</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: popeye089</div><div class="ubbcode-body">Personally, my opinion, forget the BDC knobs. They are for a general lot with specific weather and terrain factors. Yes you could take data and write it as a 5 +1 orwtvr your elevation is, but why would you want to? If under adverse conditions for wtvr you are doing and you are unable to use a light and see your scope settings what are you going to do? Yes you can memorize the clicks which on a Mark 4 M3 equate to MOA anyways so why waste the time with a BDC? Also say if you are on 5 +2 for elevation on a BDC knob and you want to dial up to your 800m data you would have to memorize how many clicks are between each of the BDC marks to figure out how many clicks to your 800m data? Sounds like garbage right? So why not just use staright MOA knobs and memorize one set of data numbers once? and forget the fluff of BDC knobs </div></div>
Your one set of numbers has the same flaw you claim a BDC has.Do you use the same dope for sea level 85 degrees as you do 6000" and 20 degrees?Some like them and some don't but they seem to be present on most all military sniper scopes.I suspect they atleast have a clue.
If it's dark or its that fast paced your probably using your reticle for holdovers and holdoffs.BDCs are generally close enough for minute of man which is what the m3 was designed for.If you want to shoot x rings at distance there are better options. </div></div>
Contrary to what you just wrote your argument is flawed. You gather data under different conditions so you know what your elevation changes are at different elevation and different temp. If you are talking about 20 degrees as your example showed that would equate as a 1 moa difference as a general guideline, but that's just a guideline. My data book is filled with rounds ranging from 10 F to 130 F with ranges for elevation from every range I have been to. Also BDCs are not the standard form on most Army scopes. They came standard on the M3 with the 24 but in the bii of your kit it also came with 3 more dials 1 each for the 5.56, 300 winmag, and a standard moa dial. As for the M110, the M2 knobs have standard .5 moa on the bottom for reference but if you want the BDC writings are on the top but we tend to ignore those. Also on the M107 we use M1 turrets with .25 MOA turrets. Now for the M14 EBR we use we use a variable mag M3 but that has the same setup as the M110s M2 with Moa and BDC that everyone ignores. Why do we ignore them because as stated above. And yes if it's quick target acquisition in any enviroment any shooter should use holdoff but if given the opportunity I will dial in and I memorize my dope because experience has taught me that those cool little cheater cards we all use, myself included, can't always be seen or used, but my mememory and practiced techniques can
