New .300 owner

Hey there, I'd like to get into the .300blk caliber. I usually start with cheaper options then goto more premium for uppers. For reference, 5.56 I started with PSA and now run a BCM. Is there any negatives to the PSA's 300 uppers?

For instance I was looking at their: 8.5" PISTOL-LENGTH 300AAC 1/8 PHOSPHATE 7" LIGHTWEIGHT HEX M-LOK UPPER WITH BCG & CH.

Is there a significant notice in reliability issues with PSA's .300 Uppers compared to their 5.56's? The upper will only be running subs through an Obsidian .45 can.

thanks so much for the feedback.