yea put the bipod back on if you want to use it for hunting, then go back to work on load development. If your developing a load for hunting you should finish up the development from field positions so get off the bench and go prone. Not trying to sound like I'm getting on ya
Think about it for a minute, your using rests and sand bags, leadsled ect on the bench, but as you just saw it changes things when you change your rest. So does it make more sense to do everything simulating field positions, or do your load workup and practice from a bench in a benchrest like manner and wonder why things aren't the same in the field.
I found this out the same way you did years ago, so now when I set a rifle up to be shot in a certain manner I shoot it in that manner always. I hate nasty surprises like that.
Keep in mind the animals we shoot for food and display are not bullet proof. Contrary to popular belief, they bleed and die just like they did a hundred years ago. Being competent with a given rifle is far more important than impressive ballistics and poor shootability. High velocity misses never put a steak in the freezer.