https://www.americanpartisan.org/2021/07/red-dot-or-lpvo-by-nc-scout/
They work – even with 55gr FMJ.
Strongly recommend the 200/300/600 facility at CMP Talladega: good people, great equipment, and a chance to get to know your rifle for practical work, including an intro to wind effects.
https://thecmp.org/ranges/talladega-marksmanship-park/
Tempus fugit.