I absolutely agree with Supercub on this one. I love shooting open sights at the big gongs at 300 yards, just to get better. But, even with a benchrest, it is a miserable time to shoot the 8" ones at 300 yards. With my scope, same round, same gong, same range....I can nail it every time. That my friend will be the difference between a quick and humane kill and dinner on my plate in the winter to a wounding or worse.
To the rest of the post

Wow, talk about the ramparts going up and the lines of battle being drawn. Lets go out the range. I'll bring my two 30-06's, two 308's, a 243, my 257 Weatherby and my 8mm mauser. You bring your .303 and we'll have fun.
In the end, I betcha you will like my Weatherby bush gun in 308, if you like your 303.