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Old December 9, 2019, 10:04 AM   #37
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Join Date: March 1, 2009
Posts: 2,903
the 6 BR seems pretty forgiving as far as jump and velocity, here is the original load workup. Pressure issues did not develop until the barrel started tightening up at around 125 rounds. Here is the initial load workup rounds 36 - 61 were the seating test and initial charge test were rounds 62 - 87

Loaded up 40 more rounds in the Norma brass 10 rounds each at 27.5 - 27.7 -27.9 - 28.1 back to the range tomorrow with fresh batteries in the chrono. Rain Saturday so no match no pressure.

edit Berger emailed me a data sheet - Varget min is 26.5 max 29.4 in a 24 inch barrel. Only other powder on the sheet that I have on the shelf is RL 15. Looks like most of the powders they recommend is stuff that you would see on a .223 sheet

edit 2 also loading 5 more rounds at 29.2 using new cases to see if the case change theory pans out
Attached Images
File Type: jpg 6BR 105 Berger seating test small.jpg (146.7 KB, 10 views)
File Type: jpg varget 29.0-29.4.jpg (99.1 KB, 9 views)
File Type: jpg Varget 29.6-30.0.jpg (99.0 KB, 8 views)
“How do I get to the next level?” Well, you get to the next level by being the first one on the range and the last one to leave.” – Jerry Miculek

Last edited by hounddawg; December 9, 2019 at 04:25 PM.
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