philcox
WKR
I have a quandary on determining the neck size bushing for my RCBS Matchmaster FL die set. Here is the situation ...
Taking the .002 off would give me .339 or .336. I originally bought the .339 sizing die because I trusted my mic.
Now the quandary: With the .339 bushing in the FL die, when I measure the neck of a loaded round that was sized with that die, it ends up being .335 ????
So I am wondering how I neck size down a cartridge to .339 and then end up with a loaded neck of .335? I just don't get it. I am new to this whole thing, and must be missing something. Any insight is appreciated. Does anyone have good specs on what neck bushing I would use in the 300WM with Lapua Brass and wanting a .002?
Thanks in advance.
Phil
- 300 WinMag
- Barnes 175g LRX
- Lapua Brass
- Walls on 5 different cases were .016
- Projectiles were consistent at .309
Taking the .002 off would give me .339 or .336. I originally bought the .339 sizing die because I trusted my mic.
Now the quandary: With the .339 bushing in the FL die, when I measure the neck of a loaded round that was sized with that die, it ends up being .335 ????
So I am wondering how I neck size down a cartridge to .339 and then end up with a loaded neck of .335? I just don't get it. I am new to this whole thing, and must be missing something. Any insight is appreciated. Does anyone have good specs on what neck bushing I would use in the 300WM with Lapua Brass and wanting a .002?
Thanks in advance.
Phil