If you want to be cheap, and have a bathroom scale, weigh yourself, next weigh yourself while holding the rifle. Subtract the numbers and that is what the rifle weighs.
Chip
Thousands of dollars for rifle and scope and you get DQ'd because you trust the equipment weight to a scale accurate to 2 lbs.
Put the rifle in a nondescript box. Weigh on scales in the lobby at the Post Office. Weigh the empty box. Subtract the second from the first, and there you have the rifle's weight.
Ever figured out what caused those zero issues?. . . Used it for years with zero issues . . .