Re: Bertram brass sticking in shell holder?
Helidriver,I just got through fully prepping 100 Bertram brass which included squaring or trueing case heads and neck turning. I learned some interesting details about the Bertram brass.
#1-- The case diameter is larger at the web, .5475 to .548 compared to RUM brass at .545 and .404 Jeffries @ .542.I don't understand why they would make it larger?? If your reamer is a custom tight reamer there could be issues but most likely not.
#2-- The reason they don't fit some shell holders is the extraction grove is not cut the same shape or depth as RUM brass. A Lyman #5 worked fine for me as would a RCBS #43.
#3-- The case necks were between .0015 and .0025 thicker from one side to the other which is similar to the average RUM brass. The finished neck thickness was about .001 thicker than RUM brass.
#4-- The case heads were the closest to being true or square of any brand of brass I've ever prepped and I've done close to 30,000 pcs. in the last 20 years.
#5-- The texture of this brass while neck turning is much different than any brass I've turned before. It was tough to get a clean cut with no lines. Might be the difference in alloy that is giving better case life?
Just a few observations from my first contact with the new .338 Edge, Bertram Brass.-- RHB