I second everything that Birdhunter50 had to say about Ellis, my teacher on the conversion process, prior to his writing his book on same subject. Prior to Ellis offering that Tech. College class, I had begun to do initial conversion work and experimentation, but with the class, I learned so much, and it saved me a lot of time I would have wasted getting to the point Ellis already was. Thank you so much, Ellis.

What Ellis had to say above, about converting to .500 using suitable 12 ga. frame, I fully agree with, of course. What he says, is clearly demonstrated too, in the Sabatti .500 NE. Though the action is 12 ga. size, though robust and extremely strong for such use, in the Sabatti, the end product is a double rifle that is simply too light in weight for caliber, with barrels having too abrupt taper, making them too light in weight. Shotgun frames are even lighter in weight than the Sabatti frame. Having done a few conversions in .500 N.E., I now consider any 12 gauge frame size to be borderline at best, and not really suitable for .500. However, the suitable 12 ga,. frame works reasonably well for the .500/.416, if done right, in my experience. The suitable 12 ga. frame size, in my opinion, is suitable for double rifle cartridges in the .450, .470 class size. Ellis is correct too, of course, regarding anything larger than the .500, in suitable cartridges for double rifle. A very talented Montana gunsmith I know converted several Spanish 10 gauge 3.5 inch mag. frames into full .577 NE, and I have done the same, so I know that the big 10 ga. mag. suitable frames, with Greener crossbolts work well for the .577, and, naturally, they work well for the .500, much better than any 12 ga. frame size, giving more suitable ending rifle weight and balance.