I have a 10.5” I can test; I’ve got CFE223, 2000MR and RE15 that are suitable for SBR velocity testing and hopefully I’ll have a 13.9” up and running soon-ish

TAC is a powder I’d like to try due to how it meters, as well as velocity and accuracy from it. If there’s any in stock the next time I buy primers online I’ll snag some