Mine also lost velocity after the initial firing. I rolled with it and ended up at 2775 in a 24" bartlein.Had to re-work my load for 1x fired brass. Dropped 40 fps using the same load that I used in new brass. Went from 26.9 to 27.3 grains to get similar velocity. Still getting single digit SD. Might try some Varget.
That is what I like about the 88gr ELDM. I just bought 1000 and they were $.20 each shipped.KS arms barrel 1:7" twist 5R 28"
90 gr VLD target, .030" in to the lands.
29 gr VV N150.
CCI BR4 primers.
905ms(2970fps) at +20°c. Excellent precision, and low ES.
Ive gone up to 30gr, which gave 920ms(3020fps), at +10°c. But rather go a bit slower while fire forming.
+10°c to +20° with a bit warmer powder gave a 5ms change in speed, so seems quite stable.
If your going to test it, start at 28 gr.
Going to test N550 and 88 gr Eld match next, due to the bergers are almost 2x the price over here...