I have a lot of respect for Browning firearms and design. I own only one a BLR. The only bad experience issue with the BAR was a hunting buddy who had a new .270 in the 80s and it was, i would call, unreliable with many factory 130 loads of the day. I handloaded 150 gr Ballistic tips for him and it seemed to solve the cycling issues. We chaulked it up to a "one of" because no one else seemed to have any issues though there weren't near as many Brownings used locally as Winchester and Remington to establish any data on cyclic issues.
Just 3 years ago he decided to pick up the same rifle/grade in .30-06 ,20 years on from the first one and by god hes had reliability issues with it. I dont reload for him anymore, nor hunt with ,so i dont know why its unreliable. It was just maybe a strange coincidence that the only 2 i was personaly involved with, were unreliable. To me the long action .270 had an under- port pressure issue. Never heard anyone really complain about the short action BARs.
This could have well been a coincidence with these two rifles ,but it left a subconscious red flag in my mind to this day, every time i considered the short carbine BAR in .308.
Is there anyone with alot of experience with long action .270/.30-06 BARS from the 70s and 80s that could comment on any reliability issues and what if there were know issues, caused them. Thanks in advance.

PS i forgot to say the .270 was very accurate.