Mystic Precision
CGN Ultra frequent flyer
- Location
- Summerland, BC
Noted. Learned a bit more here as well. Thanks Jerry.
Regards
Ronr
***edit...if I suspect donuts forming do inside reamers remove? I haven't noticed on PRVI or Lapua but the Federal stuff that I sectioned had some features starting like the photo's Ed posted. I chalked it up to Federal being soft but this has got me thinking a little bit. ***
In theory, the insider reamer is the right tool... the problem is that the actual size of the inside neck reamer may not fit what you are trying to do. yep, I got some insider neck reamers if interested... all have been used exactly ONCE.
The key to dealing with donuts is to process the cases in such a way donuts cannot form. Outside neck turning and proper neck sizing is the only way to ensure donuts don't occur and that has to occur from the first firing. I know shooters like to skip steps and have so called "no turn" chambers BUT the case itself, doesn't care.
Brass flows under pressure.. if you need to trim, where do you think the brass came from?
Brass doesn't flow evenly or consistently either in each case and most certainly from case to case. Fire brass enough times, and you will have a dog's breakfast of dimensions... regardless of the brand you use. I have shot pretty much every brand available in Canada both current and old... they all show the same good and bad.
The steps to process have not changed and will not change. It is up to the reloader to decide what is important and how much effort they are willing to invest into their ammo... both for safety and performance.
YMMV
Jerry