Load suggestions for 18” 6.5cm??

[Tsu45]

Any suggestions on a short 18” barrel load? I have 123gr SST on hand I’d like to use for this as furthest shot with this particular rifle would be ~250yds due to vegetation.

Powders I have on hand:
8208
varget
4350
RL26 (this stuff has been fairy dust for me in other 6.5 rifles but the all have had 26” or so barrels and heavier bullets)

 

[Jody Simcox]

I load my son’s 18”
Proof-barreled CM with 123 SST’s and 8208….shooting in a slower, but very accurate node….shoots 1/2 MOA to 915 yds for him…