What is the size of the three chokes he offers? The web page when I looked essentially says one is for close, one is for not as close, and one if for just a little further away. I am assuming they are close to IC, M, and either IM or F.
I imagine their constrictions are based on the particular choke thread, meaning an invector plus wouldn't be choked as heavily as say a mobil choke, but all designed to achieve the same purpose.
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