Petzel. Could have guessed.
A true 0.5" guarantee is very useful, much more descriptive than "tack driver" or "shoots lights out". It's the first step in objective communication between the builder, and the customer.
Knowing I have a rifle/load combo that makes the 0.5" club, eliminates excuses, and challenges me to get better. It sets up a situation where I can work on my weaknesses in a constructive fashion.
I'm challenged at the range to stay under 0.75" these days. Most groups go 0.6-0.9" even with the rifles I beat the 0.5" mark with on occasion. Putting in time to make that mark helps one regardless of the range.
I saw a number (Litz I think) that maintained using a 10" plate at 1000 yards, the difference between a rifle capable of 0.1" and one that shot 1" groups was only about 1%. Statistical analysis-numbers I don't understand, and likely neither does Petzal or he would use them rather than hyperbole, and defamation.
I usually only read Petzal in the Dr's office, and consider him much less useful than a 0.5" rifle.
That is the insulting part.The people whom it may help are those who have an unholy fascination with shooting game at long range, as opposed to hunting game. And they should probably not be encouraged.
Probably shouldn't have said that a 1/2 MOA rifle is useless to the average Hunter because it will kill game for them. What I meant to say is that at those ranges a 1/2 MOA rifle is just as good as a 1-1.5 MOA rifle to the average Hunter at those ranges. They will both get the job done. If it is their preference to get a 1/2 MOA rifle then by all means they should have at it. A writer in a magazine shouldn't make that decision for them and he definitely shouldn't be bashing his fellow hunters by spewing out things that he has possibly no clue about (longrange hunting). But I don't know him or his hunting experiences.
And when I say the average Hunter, I am talking about the guy that breaks his gun out right before hunting season...shoots it 1 to 3 times and thinks he is good to go.