Went to range to test out new 6.5 build; used 2 different magazines and three different types of ammo: Hornaday 123gr Vmax, Wolf 120gr and 123gr. Gun shoots well but bolt doesn't lock open after last round. I can manually lock bolt open no problem.
The J&T upper has 20in barel with free float tube. I do have a milspec 6 position stock with 3 oz buffer which I suspect may be my problem. I have ordered a H2 buffer which is about 5 oz based on reading other threads on this forum.
I also had one stove pipe round today which was the last round.
Any ideas appreciated.