Perhaps I might assist you. See, I bought 40 flats of RIO 28ga when they were $50 a flay (yeah, that's 10,000 shells) and the AA-HS were $80 or $90. So, I can ASSURE you of numerous tidbits, not the least of which is, I would've been better off buying $2,000 worth of HS 28ga and only getting 20+ flats, as opposed to walking away with 40 of RIO's. RIO's are not, and I fear never will be, even close to a 'substitute' for HS 28ga. RIO's are; however; a d*mn fine replacement for Rem 28ga, when you consider how much more expensive the Rems are.
Now, that said, I have succeeded in making lemonade out of lemons and I am getting four (4) reloads out of the RIO's and, for the last year, have been loading them with 5/8oz lead using the Gualandi 28ga wads available from BPI or Grafs (I bought my, err, multiple cases when they were at
[email protected]). I have no problems with the metal heads swelling as I resize them before reloading them. Because I use a single stage press and not a progressive; however; I have no 2nd finishing crimp die and so, after I reload 'em the 1st time the crimp ends swell a bit and I can't get 'em to feed through my pumps or semis but, that is okay. After getting them through those guns twice, I am happy to shoot 'em through my 28ga o/u's and sxs's!
I only buy HS 28ga shells new now, minimum $1M at a time and rebate or not -- how can I not when I get 8-12 reloads out of 'em (there're some who do better than even that!)
Best o' success!