gamestalker
member
So I was forming some new brass yesterday at the range, and because this new brass was so excessively short, I wanted it completely up against the bolt face during forming to reduce stretching down near the case head. Never having had a problem, but having heard for years that up to or into the lands and pressures will run significantly higher, so i used this opportunity to see just how much different pressures are with the bullets jammed into the lands. I've never had problems before with bullets jammed or close to the lands, but I thought this would be a good time to check it out.
So with both 7 mag and .270 win, I decided to run my powder charges from the bottom end of the table all the way to max, and with two different powders, RL22 and IMR-7828. I couldn't see or feel any difference with any of the cartridge / firearm / powder combinations. Even the max compressed loads were fine, nothing but nicely formed brass resulted. But I imagine that faster burners might cause an issue, but I don't use those, so...
GS
So with both 7 mag and .270 win, I decided to run my powder charges from the bottom end of the table all the way to max, and with two different powders, RL22 and IMR-7828. I couldn't see or feel any difference with any of the cartridge / firearm / powder combinations. Even the max compressed loads were fine, nothing but nicely formed brass resulted. But I imagine that faster burners might cause an issue, but I don't use those, so...
GS