When you say "a little tight" do you mean they will not go in to the pistons at all?
Before you go through the trouble of honing them, try thoroughly cleaning the pistons and pins, then coat the piston pin and piston pin hole with a light film of engine oil.
Next, heat the piston with a blow dryer (like for hair) and recheck the fit. It's likely that once the piston is warmed up, the pin will slide right in.
Have done this many times on those and it has always worked.
Best Regards...
