12-27-2017, 09:49 AM
fdbyrne78 Wrote:I'm just beginning work on an AR Comp load for 123 SSTs with my 20" Satern. There are a lot of people in this forum with more experience than me, but I'd ask how far off the lands you are. My throat is very short but I didn't notice until I burned through 100 rounds of factory SSTs and started loading my own. I started seeing pressure signs much earlier than I expected. When I went back and checked the factory loads they were well into the lands. My handloads were too and it was causing pressure problems.
My most accurate load so far with the SSTs is over 28gr of AR Comp running about 2550 fps out of my 20" barrel. No pressure signs on the brass. I did back way off when I started seating them deeper and worked back up.
What was the OAL for your loads?

