AR chambering method while load development

[biggdawg]

I backwards feed the mag, so that load #5 in a string goes in first, then #4...until my first load to be shot is at the top of the mag. No single-loading for me.

I use fine permanent marker on the side of the brass for what the charge weight is in case "someone else" comes and spills my cartridges all over.

excellent, i do this also, it also helps when loading up my ladders. i write the powder type and charge on the case then i fill them with powder, had someone dump a box of test loads once, sucked pulling bullets.

first run for me is 2-3 shots depends on the situation, wildcats with no data is one round just working up checking for pressure and velocity, then compare velocity to barrel times and then load my 3 shot ladders.