I bought Nosler 150 grain Ballistic Tip ‘seconds’ for my 30/30 Handi Rifle. No problem putting venison in the cooler. In its factory standard chamber it would touch the first 3 shots then spread #4 and #5 shots about that many inches from the first three shot group. Did exact same pattern as a 30/30 Ackley Improved. It’s just a trait of a tight barrel fit in the action. As the chamber area of the barrel heats up, it expands and becomes trapped between the breech face and pivot bar. I’m sorry I sold that neat little rifle.