Has anyone done any shooting tests, all things being equal on case prep, powder charge, and load. Control group being no annealing with a secondary group using an AMP. Has anyone noticed any differences in group sizes, or FPS, ES or SD?
Yeah did a quick test a month ago . Annealed brass was ES 8 for 10 shots ,
3 x fired no annealing was 14 , exact same batch of brass , powder , primer
and bullet . Slightly less vertical dispersion at 550 yards , as far as I could
test on that day . Load was 39 of H4350 , 140 Hybrid 0.020 off , BR4's , in
a 6.5 x 47 on 3 x fired brass .
What Im seeing is better consistency in bullet seating : that occasional slightly
increased pressure in bullet seating is gone with the AMP annealed brass .
Every bullet feels the same when getting seated . Sometimes I'd credit an
average shot to my technique when in fact it was probably a slightly tight
case throwing a minor flyer with increased velocity due to variance in neck
tension .
Ive got some x47 brass with 15 loads on it , pockets are good and shoots fine .
Im annealing every cycle now , more work and time but the results are worth it
for me . I did have to go down 0.001 in neck bush size in a Forster bushing
bump die . Was using a .289 bush for .291 loaded ammo , a .288 or .287 is
more appropriate for the annealed brass .