yes, just talkin about the typical expansion ring we all see on overloaded or bad headspaced cases.
just shot some factory Hdy and it came out fine.....still confused.
That is because the pressure is at SAAMI levels for the 45-70 aka 28,000 or less.Remington factory ammo had no expansion either but once you start getting over 28,000 the brass is going to expand at the pressure ring.There is nothing wrong with it at all and when you resize the brass,it goes back to normal.
Garretts expand and so do Buffalo Bores because both exceed the 28,000 SAAMI for the 45-70.If you watch and measure the expansion,you will notice it gets larger as the velocity/pressure increases..Garretts are rated at 35,000 CUP or less and Buffalo Bores at supposedly 40,000 CUP or slightly less(according to Brian Pierce)and there expansion at the ring is quite different with Buffalo Bores being more and both using Starline brass.
Mine do and my loads are under 40,000 CUP which the modern Marlin 45-70 is unofficially rated at.Maybe that is why they put a belt on the 450 Marlin.
Jayco
