Originally Posted by
Krh1326
Son had a good day with his .300 blackout
The Lee 155 grs loaded with 15.3 H110 worked flawlessly.
But now for the reason for follow up:
Lee 155 gr over 18 grs H335 worked flawlessly, as well. He DID NOT have a chrono available, so cannot give that data, but performed on target the same as the H110 loads.
This rifle is new to him ( Ruger AR 556 in 300 Blk ) and he was trying to install and zero a new red dot…. First time firing it…. 50 yards and less.
But still no FTF , cycles normally , locks bolt back . The data in Lyman’s AR Book that I listed up there ^ still has lots of room to increase his H335 load, when he has access to chrono.