Yes it was a serious question. My hunting rifle sets in a mechanical rifle rest where I can dial it up, down ,right & left. The trigger is half the pull, & the rest holds it almost perfectly still. I set it at 100 yds and it's a tack driver. I know I'm the error in the equation, plus the trigger sucks on the ar. I'm sure I can do a lot better, but 1/4" ? I doubt it.
Read TWR's post again. Slowly this time. Also, why even shoot if you are putting your rifle in a vise? No hunting rifle should be clamped down. It should be steered by the owner. Just sayin.. Just so you know, your question is extremely vague. Guys answering with a should shoot "4-5" groups", have no clue...