I tried 140 eld, 143 eld, and 147 eld. Not much diff in groups or speed. Brownells has 147's in stock. I just ordered some a few days ago. Midway usa has been having them pretty regular as well. I stayed with the 147's.
I also tried 142 smk's
140 Berger VLD
140 nos rdf
147 eld match was best out of them all in my gun.
paper tested to 300 yds, then on steel to 940 yds.
I tried IMR 4451 and liked it but too slow in a 24". I found some IMR 4350 and gained about 100fps. I'm still only getting 2668avg. My gun will not get the velocity some say they get with a 24". Next barrel will be 26".
This is my first remage bbl, Installed without gunsmith(my friend and I are a little above average experience level, use a smith if you are not for safety reasons)
and it is as accurate as most of the full customs I own.
6.5CM
Lapua brass
1:8 MCREE precision SS bbl remage
MP G7 chassis