Maximum distance you can reliably first-shot impact 1MOA, 1/2MOA target?

MOA is not unreasonable
Personally, I’ve had my best rifle impact miss .1 off the 1in zero target. Sun? Trigger finger? Zero shift? Lot change? I dunno.

I read this as what could I guarantee, I think hitting a 1moa target even at 100, over a long enough period of time, some variable would align and I personally would miss.

Personally 3moa, no problem.

Just my 2c.