Tom- it's doing very well. The M71-type rifle normally has the extended rim ammo as with the 11 mm Mauser, like this one that Lancaster posted:

Your rifle is grouping very well - I would suggest H4895 for further reductions if that is where you are headed. It may even shoot better than the 3031 loads as H4895 seems even better suited to reduced loads. I would not use any of the 4350's at all due to ignition problems and possible pressure excursions with reduced loads.