I have one of the synthetic model ones. With Remington Express it is good for around 2.03" 5 shot groups. As far as cold barrel 1 shots, the worst it has ever been is 1.1" from POA.
With handloads my particular gun likes the bullets a little longer than the factory Remingtons. With a hunting load the thing groups 1.88" 5 shot on average. Not really a tack driver, but more than adequate for my max 300 yard shots where I hunt.