switch barrel accuracy

[savage300rum]

I am thinking of getting a 308 barrel to add to my savage which is currently sporting a 243 win. I have worked up a load that produces 1/2 inch groups at 100 yards. If i switch to the 308 barrel and then put the 243 back on, will the accuracy still be there or will i have to work up the load again? For those of you that have a switch barrel gun, do you have to rezero your scope everytime you switch out the barrels?

thanks

[chestsprings]

On my three barrels the accuracy is still there. in all probably, you'll never see the difference, but I'm not a BR shooter.

you will have to "tweak" the scope sighting again.

just my experience