Many of the "Over the Counter" rifles have what I would term excessive freebore. I overheard a Remington Rep and a SHOT show in the early 90s say that they were putting longer throats in and telling the customers that it helped equal out the diffrences in factory ammunition. HOGWASH!!! Some of the companies are doing this to provide a bit more of a safety margin. I honestly think this is because of the advent of the various all copper bullets that have become popular, these bullets will raise pressures dramatically. Barnes has even gone to their Triple Shock, the main reason for this is to lower pressures. There is another very outstanding bullet that is also all copper, it is made in South Africa and I have been using them for the past 5 years. I think they are better than the Barnes.
I have spoken with Gerard and also communicated with him via e-mail. He has a lot of very good and informative information on his web site that merits you taking a good look at. I HIGHLY recommend his product, even though the price is a bit high his bullets are worth every penny you spend.