Re: barrel break-in [280 ackley]
This happens with all Ackley calibers, because to get the brass to fill out that larger Ackley chamber, it has to acquire brass from somewhere. So they all pull the neck back a little because the case walls and shoulder have to expand forward and out during fire-forming. When forming from a regular case to an Ackley Improved version, you will a erage about .020" in height difference. The newly formed Ackley brass being shorter.
I wouldn't even look twice at it being .004" short. Now if it was .010" or more, I would be trimming my own brass long, out of regular .280 cases and forming my own.
"I'm just a peckerwood who lives in the hills with too many guns..." - Bob Lee Swagger
"Give me a minute...I'm good. Give me an hour...I'm great. Give me 6 months...And I'm unbeatable." - Col. Hannibal Smith
Originally Posted by WildRose
The 284 is to the STW what a tricycle is to a Ninja.