I have one customized rifle. It's a Winchester Mod. 70 that started out as a .375 H&H, but was rechambered to .375 Ackley Improved. Since my ammunition is made from fire formed 375 H&H cases, I decided to keep the original H&H stamping on the barrel, because getting cases with the Ackley head stamp was difficult at the time, I didn't change the stamping. A friend suggested I get the word Ackley stamped on the barrel, and if anyone asks, just tell them that is the name of my gunsmith.