Principal Skinr
Master
That Lucky Gunner test involved major mag dumps, heating the barrels up to the point of glowing. I'm pretty sure that magnified the wear from the bi-metal jackets compared to plinking where the barrel doesn't get very hot and you are not dumping mag after mag through the rifle.
Also, by the time you wear the barrel out, let's say in 10k rounds (assuming bi-metal jackets wear the barrel faster), if you save 40 bucks per 1k of ammo by buying steel, you are looking at $400 in savings. You can buy several decent barrels for that price, two good ones, or one REALLY good one, with money left over. The cost advantage to steel is significant. I also believe you'd go well beyond 10k rounds on a good 4150 barrel, especially if not over heating it, and also if the barrel is chrome lined.
Also, by the time you wear the barrel out, let's say in 10k rounds (assuming bi-metal jackets wear the barrel faster), if you save 40 bucks per 1k of ammo by buying steel, you are looking at $400 in savings. You can buy several decent barrels for that price, two good ones, or one REALLY good one, with money left over. The cost advantage to steel is significant. I also believe you'd go well beyond 10k rounds on a good 4150 barrel, especially if not over heating it, and also if the barrel is chrome lined.