The bottom second lug on a 452 is more of a guide then a locking lug. Out of the many I’ve seen in hand, 90+% of them both lugs will not make contact. The face of these lugs are tiny compared to the single lug on the 455. Even with both lugs making contact the 455’s single lug has just a hair more surface area. Point is 452 isn’t better due to this. The action on a 455 is overall more robust then a 452 but is it enough to say it will give an advantage? No. The other aspect that is argued over and over between the two is the method on which the barrel is attached. From the factory, the Barrels on the 455 are not machined to a Precision slip fit. With tolerances stacking, they all fall in specs but not so much ideal for accuracy. When the actions are heat treated things move so not everything is perfect. The 452 has a more solid attachment but these things ain’t Precision fit either. They ain’t truing these things during the barrel fitting process so the point here it’s all luck of the draw with whichever one you choose. The 455 has the advantage if your gonna build off of it. It’s easier and cheaper to do it. The Barrels on both rarely ever slug well and the leades in the Barrels almost always look like they where cut with a butter knife. At the end of the day out of the box these are sporting rifles made to hold enough accuracy to hunt small game. They will do 1/2”-1” out of the box at 50 yards with a impressive fit and finish for the money. The good news is the 455 can be modified to deliver one hole accuracy. It’s takes a custom fitted match barrel but the benefits are the cost, accuracy, and flawless feeding you will get from it. For the cash their is nothing better I know of that will hang with these all around as a tactical trainer.
