I've just read all three reticle manuals for the Razor II-E. I'm no expert, but this is my takeaway. (First two are universally applicable, third is Razor specific.)
MRAD - relatively easy to do the math so you can use it for ranging, but you have to change from thinking in MOA to thinking in MRAD. If you have other rifles with other scopes that work in MOA (even duplex reticles with MOA adjustments), this requires you to be bilingual and carries built-in opportunity for confusing oneself. Probably the most powerful tool if you are willing and able to commit to it.
MOA - can still use it for ranging, but the math is less elegant. Or if you're OK being off by 4.7%, you can simplify it quite a bit. You can think in MOA for this and for all your other scopes that are adjusted in MOA and may have MOA-based reticles. More likely to be compatible with your other stuff if you have a variety of equipment.
JM-1 - designed for shooting as quickly as possible at ranges identified using other means (like a rangefinder). Hash marks are customized to the ballistics of specific bullets at a specific MV range (typical ARs). Minimal (almost no) support of windage compensation via the reticle. Simplicated and streamlined, customized for a specific role. Probably the best if that's what you intend to do with it, but ultimately less versatile/universal than the others.
Is that a reasonable summary?
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Not another dime.
I think so, but it’s worth noting that the JM-1 is an MOA reticle so it shares that benefit of commonality with pretty much every red dot but also that MILs is the universal language for long range shooters so if you choose MOA or JM-1, you’ll be speaking a different language if you ever work with anyone else.
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What kind of hunting are you planning to do with an 11.5” 5.56? If I had to choose from the 3 scopes you listed, I’d go with the Kahles. Of course, if you’re going to spend Kahles money, you could also consider Swarovski. Once you reach that price point, you’re going to get great build quality, superb glass and lighter weight. The choice becomes largely about reticle selection, which is determined by how you’re going to use the rifle. I’ve used Vortex, NF, Leupold, Kahles and Swarovski 1-6 scopes for 3-gun and hunting a variety of animals over different terrain and conditions. My favorite LPVO is the Swarovski Z6i or Z8i with the BRT reticle. Swarovski has an online ballistic calculator that allows you to enter your load and get drops for your reticle. I’ve found it to be reliable. If you don’t need a ballistic reticle, the 4A is uncluttered and the dot is bright and crisp. For 3-gun, where you need to make quick shots on targets at various ranges, the ballistic reticle is terrific. For me, hunting with an LPVO has always been inside 200, so no drops necessary. Pig hunting in south Florida involves shooting moving targets low to the ground, moving in and out of brush through varying light. The Swaros can’t be beat for FOV, clarity, brightness, dot quality.
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If those things are still going for like $2k, you can find razor 1-10s for the same price...
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