from what I have heard a sealed can is more quiet. I dont know it its just hype or not.
It is all so the only can I can find that the makers will guarante on both my 45-70 and on a 458 Lott (Ruger #1)
Most of the Cans for a 458 Socom are not built to handle the pressure of a 45/70 Govt much less a 458 Lott.
Shot placement is everything! I would rather take a round of 50BMG to the foot than a 22short to the base of the skull.
all 23 of my guns are 45/70 govt 357 mag, 22 or 12 ga... I believe in keeping it simple