If the 2.5-8X36, VX3 can't be had in a Heavy Duplex, you can order the scope direct from the custom shop with one installed. I've done that with other scopes.
The Heavy Duplex works so well I rarely find nightime conditions where it won't work in my 6X42's. A larger objective scope should work quite well when set at 6X for US legal shooting. If it doesn't, you can use JJHack's trick. Turn the magnification down from 6X until you can see the reticle.
On the target range, you might find the one inch thick thin section a bit annoying. But in the field, against big game or large varmits, it simply isn't a problem. The other advantage it has is that the eye seems to pick it up faster than the thinner reticles. E
Making your own targets to suit the reticle works quite well. I've shot 300 yard, five shot groups in the .5 to .6 MOA range with the 1.75-6x32 and its thick version of the heavy duplex.
