Fine barrel but a slow one - True Precision Pistol Sig P365 XL Barrel, Threaded

Nice barrel, the o-ring is a great addition. I bought it for more velocity in my P365-XL, with the added 3/4," and found it consistently no faster than my standard 3 3/4" XL barrel, sometimes slower, with 5 different ammos, including 115-gr WIN practice ammo, WIN Ranger 127+P+, Speer 147 GDHP. I'll keep it in case I ever add a suppressor. Perhaps my XL barrel is a "fast" one, perhaps this T.P. barrel is more highly polished and so less pressure and slower, I've no idea, but I'll run my handier Sig XL barrel for carry.