20x45 (20 practical)

Got my 20 practical CBI 24" select SS bbl. this week. Installed it on my Savage action.
Range today with these over my chrony @ 100yds
40g vmax, 24g h4198...................FAST!!!....& ..WAY TO HOT!!!, flat primers w/craters....Av fps was 4187 fps.....6 shots @ .626"

40vm, 25g h335......................................3791 fps & nice primer....much better!
32g nosler varmegeddon, 20g h4198.........3434 fps.
40g berger, ...........................................3614 fps.
32g nbt, 25g h335..................................3958 fps.
35g berger, 23.5g h335...........................3445 fps.
32g barnes, 23g aa2015..........................forgot to write it down...should be about 3600 fps
30g berger, 24g blc2...............................3496 fps.

The 7 loads above (except for the top 40g vm load) all went into the same POA and grouped @ .396". It was getting dark so I just ran 1 shot of each load over the chrony at the target and was happy they all went into the same spot.

COL on all the above is 2.190". All trimmed to 1.750"
COL measured in the throat on all bullets is 2.200"

There is no free bore, rifling right to the neck.
Copper fouling was very light, getting a wipeout soak as I type though.

FWIW 39gr Sierras over H4198 @ 3850 gave unreal accuracy out of the CBI 20 Practical I built a couple years ago.

^^ ^ I have lots of those, but it happened to be one of the bullets I didn't load up any test rounds with.

To be honest everything that I tried shot well, but these shot the best.