Tried to post before, screwed up trying to decide between a Widow PMA or a PSA, I want a 60" bow, about 52@31". Will be shooting aluminums. What are the diffrences between these two models?

Best I can tell,riser length and sight window height.

I have shot both and own a PMA myself.  If you want/need a 60" bow go with the PSA but I would recommend going to a 62" bow and buying a PMA...they are Black Widows self proclaimed tack-drivers and I would have to agree 110%!  The only difference between the two is the PMA is a little heavier with a longer riser to accomodate a much larger sight window, which I prefer.

I have had both, I like the short riser/sight window a bit better but either work well!

The PSA will have a longer working limb than the PMA at 60" due to the difference in the length of the riser. That said, as smooth as Widows are, the PSA will be a touch smoother. Another consideration is at what draw length? I draw 30" and have an old 60" SAII I bought new back in 97" and 62" MAIII that I bought new in 98". I prefer the feel of the 62" MAIII. That was before Widow started putting phenolic in the MA riser, so my larger, longer MA is actually lighter than my shorter SA.

I have a 30" draw and own both PSA and PMA 62" models at the same weight. IMO the PSA is smoother than the PMA due to the longer working limb. I also have a 60" PSA for ground blind use and it has the same feel as the 62" PMA. Either way they are both great bows. I seem to shoot the longer bows better and if I had to pick only one length it would be the 62" PSA. If you perfer the feel of your 62" MAIII you will really like  the 62" PSA. Good luck with what ever you pick you can't go wrong. Glen

I have a 29" draw and have both PSA and PMA 62" models at the same weight just like GMASIUK and will second everything he said about the the differences I've found between the two.
I also like the lighter mass weight of the PSA and always seem to reach for that one on the rack.Can't seem to get the PMA as quiet as the other one for some reason though all the deer I've taken with it never seemed to care.Good luck,they're both fine bows.