What CW said, I have two H&R Whelens, a 26" RMEF Ultra and a 2006 22" Handi, no problems with either of them, the previous owner of the 2006 shot Rem factory ammo in it with no issues, I only handload myself. I did have 5 pcs of new Rem brass that had the shoulder pushed back way too far which likely would have caused a problem if I loaded them as is, I suspect that's part of the Whelen's problems, bad brass from the get go.
Tim