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I have loaded 6000rnds of 55fmjbt, once fired mil brass and did the below test prior to loading----I am getting very different results from other reloaders.....If anybody out there has any experience with this powder please reply !!!
DATA: I loaded over 400 rds to test 50rnds for each load with the following results:
55fmjbt/20" ar-15 and mini 14, electronic and balance beam scales, 2 ea in line cronos.
quality control checks: pulled and measured powder on 3 rnds in every batch.
23.0g-----2600fps (open group @ 25yrds)
23.3g-----2700fps ( " " )
23.5g-----2850fps (" " )
23.6g-----2975fps (tighter )
23.7g-----3050fps ( best group and a
deviation of 50fps for 50rnds
23.8g-----3150fps ( good group)
23.9g-----3250fps (not as good as 3150)
23.7@3050fps had the best group and provides for preassure safty
Once agian if anyone has any more information or comments please respond...
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