Originally Posted by Freddie Hunt
Firstly I'd like to thank you all for your prompt and detailed responses - very much appreciated. And Boomtube, I am sorry that I clearly offended you, I had no intention of doing so.
I am using Federal Brass that was factory loaded then fired in my rifle, this batch is the first reload. The dies that I am using are Collet and the lube is RCBS Case Lube-2. I can now see where I must have been going wrong - not being careful/meticulous enough when preparing the cases. How foolish of me!
CogburnR, would you recommend I buy some sizing wax or is the RCBS lube sufficient in your opinion?
Since writing my original post last night I have tested the ammo today. I Loaded 3 lots of 3 rounds with 3 different powders, all other variables equal. The results were;
1) H380 54.0gn = 1.2" group @100yds.
2) IMR4895 49.0gn = 0.25" group @100yds
3) Reloader15 47.0gn = 0.25" group @100yds
Unfortunately my Chrony ran out of batteries so I didn't get any MV results - man that pissed me off!!
You don't need lube inside or outside the neck using a Lee collet die neck size die
The only time it may be needed is with very soft annealed case necks that can sometimes cause some drag on the mandrel as you extract the case. Then use dry lubricants .
Clean and polished is what you need . If excessive lube builds up on the mandrel inaccurate results will happen. A small amount will not do much harm but you don't want liquid lube inside your case necks as it can upset powder flow into the case . That is the whole idea of the Collet die to be able to size with no lube .
You need lube for body sizing and full length sizing in that kind of die.
Your results seem good so you must be getting good straight ammo from the dies.