10 gauge resized shells will not chamber

[Craig Larter]

I load for 10ga Parker and 10ga LC Smith. The Remington rim diameter is larger by about .010" versus the Federal hulls. I have found the Smith's will not close on the Remington shells because the recessed rim in the Smith chamber is cut to a smaller diameter versus my Parker. So I can use Federals or Remingtons in my Parker but only Federal in my Smith's. After many years of loading for 10ga I find the Federal hulls more durable especially at the mouth of the hull.