I am a new member and did a search on this topic but could not find what I was looking for. Im sure it has been brought up, but dont want to be redundant.
Do I use the round that I have that is most accurate/expensive based on reviews, or do I use the round that I will be using at the range most often.
I have zeroed it at 50yds and have been getting ok results, but I am going to re-zero.
I zeroed it originally with bi-pod, but now want to re-zero with a better platform (i.e.) sandbags and rear rest
At 50 yards, you won’t see much of a difference between most bullet weights/velocties. Now if you are shooting at 200yrds or more, you will see a difference between them. Pick what you intend to use either in competition or defense.
Do you carry this rifle for duty/defensive purposes? If so, zero with your intended carry ammo. Then, learn the deviations for other loads you use. If you zero at 50yds and keep your shooting distances 0-200, your deviations will be fairly minimal. They will be more pronounced as you stretch out.
You could also average your zero between 2 or more loads to limit need for adjustment.
I prefer to zero a working carbine without the use of a bipod, bags, or rests. Go prone, monopod the mag, hunker down behind the gun, and shoot.
See many previous threads about zero practices and procedures otherwise.