I was shooting my 45-70 this weekend, and was reading teh loads from Sierra, hodgdon and others, and was shocked to find out they recommend 60+ gr for 300gr bullet. I can barely fit 58gr in there before I am crunching kernals, and can't seat further than 2.54" with sierra HP.

I called sierra, and of course they said they had no issues getting 61gr in thier case and loading the bullet to 2.53".

Anybody else????