Trim Length for 6.5mm BRM and Other Brass
Trim Length for 6.5mm BRM and Other Brass
There are two reasons to trim your brass: First is just to make sure it's
not too long for your chamber. But second, is to even them all up to the same length
for accuracy considerations.
1. A Chamber Diagram (left) will tell you the maximum length. If everything
measures shorter than that, you shouldn't have to trim unless you want to even
them all up. Chamber diagrams for most cartridges are listed at the
ammoguide.com website.
2. How to Choose an "Even-Them-Up" Length
- Quite simply, measure the length of each fired case and determine which one is
the shortest. Then, just trim them all to
match that shortest one.
Uniform case lengths improve the consistency of bullet alignment, exit
gas pressure as the bullet leaves the case, and bullet retention friction in the
case neck. If you haven't got a case trimmer, we recommend the
Forster Original Case Trimmer. It's the easiest and most versatile
case trimmer available.
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