6x45 all the way. I've got two on Vixens, one with an 18" barrel & the other in 23". They are both very accurate, the 18" has the edge as its a Bartlein barrel and the other TF. Wingman will tell you all about the limitations of OAL in the mag, this is why you have to stick with a 45mm case, forget about TCU or 6mm204 or 6.5-204 its not long enough to be versatile over the 223 case.
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