Re: Nesika\'s for hunting (worried about dust)?
I would bear in mind that they may be wording things a bit differently that you do...
Them saying that they build all their actions on the same tolerance level does NOT neccessarily mean what you interpret it to mean.
If the bolt body fits too closely in the reciever, then a bit of dirt, sand, etc. can cause galling and stuck bolts. To avoid this, makers of tactical and hunting actions leave the bolt body fitting a little looser. Some have labeled this "looser tolerances" but that's not entirely correct.
Tolerance is, most correctly, the acceptable difference between what the design spec calls for vs. what the machining produces. If the design spec calls for a looser fitting bolt, and they build all their rifles to within the same tolerances, then you will have a very exactly looser fitting bolt.
I would suggest, on the other hand that you perhapse look into getting a genuine Borden action, either a rimrock, or one of the hunting versions. The only reason I suggest that is Mr. Borden has a patent on his invention, the "borden bumps" and according to him, he never authorized Nesika or any other maker to incorporate that invention into their design. I find doing so anyway to be a distasteful and dishonest thing to do, and personally would not patronize a company that behaved in that fasion.
Also, run a search on Nesika. More recently, since they and Dakota went belly up, things have not been going so well for people who order their actions. At least one VERY long post of a true nightmare, and several smaller anecdotes are running sround about this...