I have both the above calibers. 6x284 has a Hart varmint 26" 10" twist BBL with about 750 rnds through it. the 22-250AI has a Mike Rock Cut rifled 5R 8" twist BBL( Sporter weight BBL) with less then 500 rnds through it including fire forming. Both have throat erosion. The 6x284 still produces less then 1/2MOA and the 22-250AI produces 3/4. So if these BBLs are shot out I have no complaints.... Is the 22-250AI a faster BBL burner then the 6x284?