Nikoplex or bdc
Looking at a nikon m 223. Will be using it on a colt le 6940.
What do most folks prefer for a reticle
I prefer the Nikoplex. The BDC is just to busy for me. With the fast action turrets you cannot beat the Nikoplex reticle.
good and bad to both....
I actually have a m223 3-12 niko on my RRA ar-15 but the fast action turrets are only really good for an ar-15 using ammo close to 55grn @ 3240fps. If you go with niko, then you are somewhat stuck with ONLY using this scope with a 556 / .223 round. I'm not a fan of BDC markings so I went with the Niko myself and figured if I do sell the ar-15 (which i most likely will NOT as my RRA with the m223 gets 3/4" groups @ 100yars),,,,, then the scope will be sold with it. So far, I like the scope. My ar-15 is 95% used for target practice @ 100yars plus so it works for me.
On the other hand, the m223 3-12 with BDC markings can be used with any caliber by using nikon's "spot on" technology (see nikon website). You are not stuck with just .223 round. I'm just not a fan of the BDC markings, BUT you might want to consider this option if you hunt with your rifle so you have on the fly BDC markings rather than spinning "fast action" turrets on the nikoplex.
The Nikon BDC reticle is somewhat similar to a mil dot or moa dot reticle . In other words you can reference your point of impact with the points on the reticle at different ranges. You can create a range card and know where to hold for shots at different ranges on the fly without making ANY adjustments to your turrets.
I'd say that you have more versatility with the BDC reticle. The crosshairs on the BDC reticle is higher than the Nikoplex reticle so you should get a lot of distance/range out of the BDC before having to make any turret adjustments.
I think that any other scope with a mil dot or moa dot reticle will achieve the same thing.