The most effective reticle on a big game rifle is a standard plex or if available a heavy plex. That more than anything else will help you aim properly in poor light situations. Fine crosshairs and BDC type ones are best suited to shooting groundhogs on a bright sunny summer day. In the snow and rain when you have an 8 point buck trotting by and have about 3 seconds to identify it as legal and then make a good shot all those trinkets just slow you down. Just as an aside, the most popular scope used by guides in Africa and Alaska when loss of life is a very real possibility the Leupold 1.5x5 is the most popular choice. They also never use see through mounts as again it just forces you to make a decision between 2 options and that can be enough to miss an opportunity. A low mounted, lower powered variable is the best option. If you dislike scopes then I would recommend yo just use a Williams type peep sight and restrict your shots to where you can hit a 6" circle off hand every shot, not just once out of 5 shots. I know people who can do that at 100 yds. They are a rare exception with excellent eye sight. Few people over 40 can be effective at long range with iron sights. In fact the front bead pretty well covers the entire deer at 100yds so I can't see how one can make an accurate shot. You are just shooting "at" a deer at that point not at a chosen point .