I only have one Benchmark pipe. My experience is quite the opposite of yours. Mine is chambered in 300RUM. Velocity difference would be substantial. Honestly, I’ve yet to shoot this barrel until it actually requires a cleaning. I’m the first to admit, I clean to much. I believe the longest interval has been about 80 rounds between cleanings and accuracy still wasn’t falling off. Cleaning has been super easy. First round after cleaning is hardly off or out of it’s fouled zero. That’s crappy you’re having issues. Are you cleaning for carbon as well? In my 257, it carbons up much faster than it coppers. I love Wipeout for copper removal but I’ve found it does very little for carbon and in the spicier cartridges, carbon has given me more grief than copper has.
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