Rockfish- Good question. I like .40 calibers and I like Encores. I've hunted Red Stag with one really enjoyed it. Yup a .375 H&H barrel will outperform the .405 Win, but it was simply the thrill of making something like this work that intriqued me. I have a long throat reamer for a Ruger #1 that I used on a .458 win to basically do the same thing. I have hit 2275 fps with that thing.-Rob