Limiting yourself is respectable if the confidence and skill isn’t there. Good on you for recognizing your capabilities, not very many folks are willing to admit that and apply it.Well it depends on how long between shots for those 20 shot groups. Are you saying a 7MM remington magnum or a 30-06 are heavy recoiling rifles? I don't shoot groups when hunting and don't take shots in non ideal positions if there is any distance involved. I do shoot a lot from "field type positions".
Some of us would rather regularly practice those “non ideal positions with distance involved” and still be able to make kills.