Ive shot some of those Lyalvale shells and they are stout. Too hot for my 2 I had at the time. Later guns were proofed like 2 1/2 guns and were built heavier which d feats the reason for being 2. Worse my gun was IM and IM so anything inside 20 yards was ground meat. I reloaded shells using Federal paper hulls and was very happy but I was trying to do with a 12 a job which I could do with a 16,20 or even 28. So I sold my gun.