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Rifles, Reloading, Optics, Equipment
Suppressors
Accuracy decrease with supressor on
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<blockquote data-quote="HSmithTX" data-source="post: 2745400" data-attributes="member: 121677"><p>Skip, no, it is entirely possible to machine threads and the shoulder off axis with the bore and out of concentricity at the same time, on a lathe. It is 100% due to poor setup. To simplify that answer the threads can be out of alignment with the bore in a left/right/up/down ANGLE to the bore centerline as well as being off center rotationally. It doesn't take a lot of error here to cause issues. My bud's 338LM went from a complete pile of junk to a decent shooter just by removing the brake which surprised me because usually the crown is done in the same operation as the threading, so if the threads are off the crown is off too but in this case it was close enough to still shoot good groups. He wanted a brake and a can to spot impacts so when he took it to his smith he first tried to chase the threads and found out they were too far off to save so he lopped them off the barrel and set it up right, cut new threads and shoulder and it shot great with every brake afterwards. The can changed POI but groups were as good if not a little better. We shot it to a mile, once the dope was right it was relatively easy to shoot sub minute groups at the mile. I think it cost him around $225-250 all said and done, lots better than $1000+ for a rebarrel.</p></blockquote><p></p>
[QUOTE="HSmithTX, post: 2745400, member: 121677"] Skip, no, it is entirely possible to machine threads and the shoulder off axis with the bore and out of concentricity at the same time, on a lathe. It is 100% due to poor setup. To simplify that answer the threads can be out of alignment with the bore in a left/right/up/down ANGLE to the bore centerline as well as being off center rotationally. It doesn't take a lot of error here to cause issues. My bud's 338LM went from a complete pile of junk to a decent shooter just by removing the brake which surprised me because usually the crown is done in the same operation as the threading, so if the threads are off the crown is off too but in this case it was close enough to still shoot good groups. He wanted a brake and a can to spot impacts so when he took it to his smith he first tried to chase the threads and found out they were too far off to save so he lopped them off the barrel and set it up right, cut new threads and shoulder and it shot great with every brake afterwards. The can changed POI but groups were as good if not a little better. We shot it to a mile, once the dope was right it was relatively easy to shoot sub minute groups at the mile. I think it cost him around $225-250 all said and done, lots better than $1000+ for a rebarrel. [/QUOTE]
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Suppressors
Accuracy decrease with supressor on
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