ttfreestyle
Silver $$ Contributor
Hey guys, was curious what real world numbers yall were getting out of the 243. Looking to shoot the 105 to 115 grain bullets. Thanks
KevinThomas said:It's primarily (in my experience, anyway) the heavier bullets that are the bad guys here. More dwell time, longer time frames to overcome inertia and get them moving on down the bore, and that translates to all that heat and pressure doing it's damage right there in the throat. Section a shot out barrel that's been used mostly with heavy bullets and that's what you see; a pristine barrel a short distance ahead of the chamber, but a small scale model of the Grand Canyon right there ahead of the chamber mouth. Really does them in, very badly. Lighter bullets tend to show lighter wear, but extending further up and into the bore than this.
You are honestly mostly right. The problem with the 243 is the shoulder angle and the short neck. A few years ago Precision Shooting Magazine did an article on just that. It is throat erosion that plagues the 243. The throat goes before the barrel and the more powder you burn the faster it erodes. The shoulder angle combined with the short neck focuses the burn forward of the case necks onto the throat. If you go with a larger shoulder angle and a longer neck then the problem is mitigated and throat erosion is reduced. That's why the 6MM Remington with a 26 degree shoulder and a longer neck is a better idea than the 243 Winchester with a 20 degree shoulder and short neck.I honestly think that the H1000, 30 degree shoulder and the longer neck helps with barrel life.