|
They under loaded it to produce sub sonice velocities (much quieter, hence whisper). For super sonic loads, cycling should be no problem. My J&T seems to get too much gas with my adjustable gas block, but that was with it wide open. I still have more experimenting to do to find a super sonic and a sub sonic load that cycles right. For sub sonic I'm going to try AAC-1680 as a powder. I've been using H4227 and it seems to work well for super sonic. Once I find some loads that work well for me, I will post the data.
In addition to brass/primer/powder/bullet variables that I am used to dealing with, the AR platform has a couple more to deal with: gas port position (mine is in the carbine position), Gas port size (they seem to range from .060" to .125"), and gas block type (I have a JP Enterprises adjustable one). Everybody that posts a load in an AR should give us an idea of their setup.
Later,
BRM
|