All I can say is that most folks shooting Schneider barrels (or any other make for that matter) don't shoot them accurate enough to tell when their accuracy drops off by 25%. When new and with good bullets loaded into properly readied cases of 30 caliber or smaller, they'll stay under 1/4th MOA at 100 yards from a good rifle shot in free recoil (untouched except for a finger tip on the trigger). I doubt more than 5% of people shooting them do that well. If one can't shoot a barrel sub 1/4th MOA, they're hard pressed to tell when it opens up to even 3/8ths MOA.
A 1/2 MOA rifle/ammo combination will appear to have twice to three times the barrel life of a 1/4th MOA one. 3/4ths MOA rifle/ammo ones may well seem to last forever.