01-25-2014, 03:40 AM
BjornF16 Wrote:Doesn't necessarily mean you are .015" "into the lands"...you may be getting resistance from the throat, depending upon how hard you are pushing the bullet out of the OAL gauge...if you don't have any problems extracting these rounds then I doubt you are really .015" into the lands.
I use a resized piece of brass with a slightly loose neck with the 123amax and feed by hand with the ejector removed averaged over 10 tries. I was getting pretty much the same every time...average was 2.230.
Using this method with the PF barrel I had I was getting 2.271 as an average.
The rifling marks on the ogive don't lie. Granted I did need a magnifying glass to see them well.(might not be from lands as they are very superficial and the factory ammo is easily extractable)
Unrelated but my fired cases expand to .300, I saw you were wondering about that earlier...