Hallo
I have problems with calibrating the base of the 223REM Lapua brass, 6× and 15× fired.
The base of the brass is so tough or big, that it is very hard to size it with my Whidden bushing Full Length sizing die. Some of the brass even stuck in my die !!
No matter how much lube (RCBS or Redding BIO) I put on the brass. Brass was allways annealed. And I allways measure shoulder bump and the brass was never too much sized. But I cant measure base of the brass very accurately.
So I want to throw brass away, but I tested one more thing: I very lightly polished my base of the brass, and now the sizing proces was smooth like normal.
I observed this with the 2 different LOT-s of Lapua brass. In one LOT it was this phenomen at 15× firing, and with other LOT was this at 6× firing.
Is this caused because of hot load, or too big chamber, or bad die...? My loads are usualy with 95gr Sierra at 2750fps with Vihtavuori N140...
Sincerely, Mark
I have problems with calibrating the base of the 223REM Lapua brass, 6× and 15× fired.
The base of the brass is so tough or big, that it is very hard to size it with my Whidden bushing Full Length sizing die. Some of the brass even stuck in my die !!
No matter how much lube (RCBS or Redding BIO) I put on the brass. Brass was allways annealed. And I allways measure shoulder bump and the brass was never too much sized. But I cant measure base of the brass very accurately.
So I want to throw brass away, but I tested one more thing: I very lightly polished my base of the brass, and now the sizing proces was smooth like normal.
I observed this with the 2 different LOT-s of Lapua brass. In one LOT it was this phenomen at 15× firing, and with other LOT was this at 6× firing.
Is this caused because of hot load, or too big chamber, or bad die...? My loads are usualy with 95gr Sierra at 2750fps with Vihtavuori N140...
Sincerely, Mark