In Lee Enfields, 1891 and 1898/09 Mausers I get the best results with the 174 grain RN Hornady .312 and the Sierra 180 grn spitzer .311 bullets. The longer bullets have longer bearing surfaces and the lengths match up to the rifling twist better. Like you I will use Fed 210 primers when I can get them. When Federals are scarce both Rem 9 1/2 and WW WLR primers work well too. I use either of the 4895 powders.