Originally Posted by new shooter
Is there a big bore rifle that will shoot to a 1760 yd that will not burn the barrell out at 600 rounds ?
30 caliber magnums used in long range prone matches years ago (and still are these days) had an acceptable barrel life of about 1200 rounds to stay under 1 MOA at 1000. A new barrel would shoot under 3/4 MOA at 1000 and that's typical these days. Max powder charges for 180 to 200 grain bullets in .30-.338's of 67 down to 64 grains of IMR4350 were normal, max safe loads. The 200's would leave at about 2950 fps and the 180's about 3050 fps from 28 inch barrels. For the .300 Win. Mag, one gets about 50 to 60 more fps and a 10% drop in barrel life. The modern 30 caliber rimless bottleneck cases holding the same amounts of powder for max loads will equal these old winners and record setters.
Barrel life discussions often get out of hand as those claiming 3000 rounds vs others claiming 1000 rounds probably have two different measuring means and methods based on their individual objectives. And some base accuracy on the smallest groups their stuff shoots while others use the largest group their stuff shoots as their method.