actually, i changed over to use the small primer as the brass itself is better- winchester nt- i don't know about federal, but the case walls were ever so slightly thicker- and everyone else at the range was using nt- it's a simple matter of changing the primer trough and pin- you can do it when you're changing shellplates anyway- THERE IS NO DIFFERENCE IN LOADS- WINCHESTER HAS STATED THIS ON THEIR SITE and it's been PROVEN on several boards-
there always seems to be a shortage of lpp anyway, and never with spp
i also saw a chart put out by winchester where it said that the FLAME from the small pistol was hotter- all good things ( improvements) as far as i know- so now my automatics share the same primer size, and i reserve the larger, more expensive lpps for the revolvers- which makes the sessions last longer anyway
also if you use range brass , you have NO IDEA how many times it's been fired esp with automatics-
unless you mark it in some way, you have no idea whether that casing you're picking up is your own or somebody else's- most people still use the large primer in 45acp, so if you use the small primer stuff
chances are it's virgin brass- which is a BIG WOO-HOO in my books