Do you zero all your 5.56 weapons for one specific round?
Guess it could be any 5.56 piece, not just AR's, but in my case it is AR's. I zero them all with Mk318 SOST. I'll use M855 to get it as close as I can then finish off the fine tuning with Mk318. That is not the only round I have in bulk but I figure that is the one I would load mags with first if it came to that. This is regardless of 14.5", 16", or 20" barrel lengths. I figure if I ran out of Mk318 I could re-zero what I was shooting with the next item in line.
How about you guys? Do you have "designated purpose" 5.56 weapons you zero and have a specific round allotted for, i.e. maybe a DMR piece that you use with 77gr (or similar) and something else for other guns? Do you choose the round by barrel length?
Do you zero all your 5.56 weapons for one specific round?
Yep. Mostly 77gr TMK and it’s marked on the stock, regardless of what particular round it is zeroed with.
I load a number of different weight bullets and have quite a few rifles and got tired of going to the range not knowing how I zeroed.