While I'm thinking about it ....we all have machines we prefer over others ....but one of the biggest issues ....
You need to decide on the hull that you want to reload ....not all 12ga 2 3/4" hulls are the same ...in fact they can be way different / which isn't logical. But some of them are a little longer, some are tapered, some have brass cups, some are steel, etc ....
In 12ga reloads ....
a. 10 Years ago 90% of us reloaded Win AA's exclusively ... But today, Win has the HS hulls..which I believe require a different wad / some of the promo loads like you might buy at WalMart,etc ...are a little different, crimp different..and may be a different quality of plastic in the hull.... So many of us / have given up on Win AA hulls ....
b. Remington has an STS hull (dark green) and a Nitro hull ( gold ) that are very durable / really strong hulls - and will almost reload forever. I have many with well over 20 reloads on one hull. Remington also has a black hull - called a "Game Load" ....and the plastic is a little thinner and more brittle than the Rem STS or Rem Nitro hulls. But all 3 of the Rem hulls are easy to reload - and take the same recipe. The Rem Game Loads will only reload 4 or 5 times before they seem to crack.
Today, based on what I see - 90% of us reload Rem STS hulls....
c. There are other hulls out there - Federal - which are fine .... / Fiocchi, Rio, Estate, etc which are all pretty much junk in my opinion ...
But you can't mix and match hulls - some WIN AA's, some STS's, some Rio's etc ..... / you can't necessarily mix and match wads or primers either . On shotshells - you have to follow the published recipe to the letter - and while some substitutions of wads may be allowed in the tables ...you can't mix and match everything...
So what I'm saying is some of the promo shells you're buying - may be junk / and not really a good option for reloading. The best hull to use, in my opinion is the REM STS hull in a 12ga. Some clubs sell once fired hulls for about $4 per 100 .../ or you might be able to beg a few hundred off someone ...( many of us that reload / have 20gallon garbage cans full of hulls ...) ...
Personally, I like Hodgdon Clays powder, Win AA 12SL wad because I load 1 oz of shot ( and I substitue a Green Duster brand wad for it ) - and that substitution is in the Hodgdon book, and Win 209 primers .....but part of the reason I use that mix ....is my club stocks all those components in case lots .... ( and I load 1 oz of 8's 99% of the time in my 12ga loads ).
The reason I happened to think of this - is it was a topic at my club yesterday ...when we found a guy picking hulls out of the garbage and he was mixing and matching all kinds of hulls... and he had some shells that were "bloopers" and some "misfires" ....so we tried to educate him ...and he had no clue ( and he can't read, can't follow directions, and hasn't cleaned his gun in over a year ....) .... Not saying you would be as foolish as he is ....but it isn't logical that all 12ga hulls are not created equal either ...since all 2 3/4" 12 ga shells will fit in a gun chambered for 2 3/4" shells ...you might think they had a mfg convention / where they were all the same ..but they aren't !!