Ruger Gen 2 in .223

[belizejet]

Anyone do any load development for the Ruger American Gen 2 in .223? Just picked one up and looking for a good varmint load.

 

[BW64]

My Gen 1 likes 70 RDFs with 24.6 Match Rifle or Varget at mag length. 2 1/4" groups at 540. Start low work up!