Posted by Michael Bell on Aug 17, 2017; 5:05am
URL: http://oldforum.flyshooter.com.au/Savage-BRX-tp5709390p5709448.html

  I might get myself into warm water over this one but in my opinion, (which is based on my observations of a few years while shooting regularly over a chronograph), the importance of ES is a bit overstated. At least as far as shooting 6mm 105 grn bullets from a BRX case to distances of 500 meters or LESS is concerned.

  I won't argue with the 1000 yard & F-Class shooters who seem to place a high degree of importance on ES as these guys know a lot more about that distance & also a lot more about the heavier 7mm & 30 cal projectiles  (that are often used ) than I do, but for Fly Shooting with the 6mm bullets we use I would suggest that a recipe that groups in that 1 " or under area at 300 meters is the thing to aim for.

 My experience has been that if a certain load regularly shoots groups to this size in moderate conditions then the ES will look after itself & will more than likely be in the 10 - 25 range.

  In the target you have posted it looks like you have 3 into about .75" with the fastest shot of 3033 fps printing higher & expanding your group to about 1.2" or so. Even though your ES is quite high at a touch over 50 the group is still ok.

  If you regularly have a shot jumping high perhaps just tweek the charge in .1 grn increments or adjust the seating depth by 3-4 thou in or out but it really looks like you're well on the way to getting it tuned to match level.

Regards,
Belly