09-24-2019, 08:15 PM
Kswhitetails Wrote:Dirty brass means extra back pressure on extraction. You're running a 24" barrel, it's likely to be a dirty girl forever. An adjustable gas block isn't going to reduce your plug time, which is where your extra chamber pressure comes from. The BCG is opening before the gasses have vented at the muzzle.
Wet tumble is your friend B.
This is an interesting topic to me and would like to understand the mechanics of it more.
Is the extra carbon fouling on the cases the result of lower pressure and less complete combustion of the powder?
Dose this also mean that the more fowled the cases are, the more carbon will adhere to the bolt and bolt carrier?
Can using faster or slower powders change the amount of fowling? I formed an opinion about CFE 223 being a dirty powder that may be incorrect. It seamed to not foul as much the closer to a max load I got.
One more thing. I noticed in my RAP bolt action when ejecting brass and catching them in my right hand that the cases were barely warm.
Cases from my BCA AR are hot enough to burn if left in the hand for more than a fraction of a second.
It the thermal difference also due to the cases being "bathed" in the gasses from gas tube?