These are factory 2nd as the colour of the anodising is not a perfect match between both sides of the magazine on side of the magazine is a lighter shade of black this is the only reason these are a factory 2nd.
WR MAGAZINE - 22-250 (250 family). - Tikka T3, T3X rifles. - Lithgow LA102 Crossover Overall Load Length (OAL) 2.6" (66mm). This magazine is SPECIFICALLY designed to feed the 22-250 case and variants of the 250 tapered cartridge.
these are the rounds supported and the number of rounds it can hold.
6BR (10)
BRX (10)
BR Ackley (9)
7BR (10)
30BR (10)
BR family (10)
22PPC (10)
6PPC (10)
22-250 (9)
250 family (9)
6.5 Grendel (10)
6mm AR (10)
.224 Valkyriel (10)
30 Remington (10)