Muley.. I spoke too soon. I had the rifle out and set to go.. went to the bullet cabinet and found three boxes of 270 grain Ball-ets. Then I remembered.. when the nephews were here last time, they wanted to shoot. Since I never used the 245 grain Ball-ets and they didn't care where they were hitting, I let them take a Knight LK out and shoot off the remaining box of the 245 grain Ball-ets I had. Sorry I could not do the test. I know the 270 grain is too large for a slow twist. But out of my 1-28 LK Knights.. they are deadly with 85 grains of powder.